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Search results for: 'why cant you hear music if you're standing behind speakers at a concert'

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  1. Serial Port RS232 RS485 To WiFi Ethernet RJ45 Converter Server IOT Device USR-W610 Hardware Watchdog Modbus RTU To TCP
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    Serial Port RS232 RS485 To WiFi Ethernet RJ45 Conv... SKU : USR-W610
    Special Price US$31.25 Regular Price US$34.72
  2. WiFi 4G Qr IC & ID Card Reader Facial Recognition Access Control Terminal with Free Time Attendance Software
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    WiFi 4G Qr IC & ID Card Reader Facial Recognit... SKU : WCAM101119340602
    Special Price US$189.05 Regular Price US$210.06
  3. Linux 5 Inch Wireless Wired Time Attendance Card Reader 13.56mnz NFC RFID Door Access Control System Face Reader Free API/Sdk
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    Linux 5 Inch Wireless Wired Time Attendance Card R... SKU : WCAM101119340604
    Special Price US$115.03 Regular Price US$127.81
  4. Waterproof 1PCS Ntag215 NFC Tags Sticker Phone Available Adhesive Labels RFID Tag 25mm Patrol attend
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    Waterproof 1PCS Ntag215 NFC Tags Sticker Phone Ava... SKU : 32959171541
    Special Price US$0.48 Regular Price US$0.53
    Out of stock
  5. USR-MB706 RS232 RS485 To 4G LTE Cat M1 Cat-NB2 EGPRS Serial Converter With GNSS DTU IoT Device Support Modbus
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    USR-MB706 RS232 RS485 To 4G LTE Cat M1 Cat-NB2 EGP... SKU : USR-MB706
    Special Price US$57.51 Regular Price US$63.90
  6. 865-928Mhz R2000 long range uhf rfid module one antenna port with RS232 interface free SDK for atten
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    865-928Mhz R2000 long range uhf rfid module one an... SKU : CFRA9003
    Special Price US$237.06 Regular Price US$263.40
  7. Jakcom R3F Smart Ring For NFC Electronics SmartPhone Accessories Quick Program Lock Black Technology
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    Jakcom R3F Smart Ring For NFC Electronics SmartPho... SKU : 32847267564
    Special Price US$16.98 Regular Price US$18.87
  8. Custom Production RFID Card +Printing Graphics Logo Standard Size 125KHz/13.56 MHz
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    Custom Production RFID Card +Printing Graphics Log... SKU : RFIDCUSTOMPRINT
    Special Price US$0.17 Regular Price US$0.19
  9. Free shipping USB port ISO15693 13.56Mhz NFC RFID reader Ntag-203 RFID Reader+ Ntag tags 10 pcs
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    Free shipping USB port ISO15693 13.56Mhz NFC RF... SKU : 32558557439
    Special Price US$53.76 Regular Price US$59.73
    Out of stock
  10. Jakcom Smart Ring Wear Convenient R3 R3F Timer2 (MJ02) Black Color Magic Finger NFC Ring For Android
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    Jakcom Smart Ring Wear Convenient R3 R3F Timer2 (M... SKU : 32832918615
    Special Price US$16.80 Regular Price US$18.67
  11. NFC Lock Smart Nail Sticker Decal Christmas 3D Design for N2F Private Screen Protector N2M Simulate
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    NFC Lock Smart Nail Sticker Decal Christmas 3D Des... SKU : 32830830413
    Special Price US$3.69 Regular Price US$4.10
  12. Serial Port RS232 RS485 RS422 To Ethernet Converter Server IOT Device USR-TCP232-306
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    Serial Port RS232 RS485 RS422 To Ethernet Converte... SKU : USR-TCP232-306
    Special Price US$17.14 Regular Price US$19.04
  13. Industrial 4G LTE Modem USR-G781 Serial Port RS232 RS485 To Ethernet Server Converter IOT Device
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    Industrial 4G LTE Modem USR-G781 Serial Port RS232... SKU : USR-G781
    Special Price US$78.62 Regular Price US$87.36
  14. SMA connector 7x7cm passive 900mhz epc gen2 uhf reader antenna middle 3dbi micros Ceramics uhf rfid tag Antenna
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    SMA connector 7x7cm passive 900mhz epc gen2 uhf re... SKU : ZKANTC7070
    Special Price US$16.80 Regular Price US$18.67
  15. Public Place Hospital Entrance Gate Turnstile Linux Facial Recognition System
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    Public Place Hospital Entrance Gate Turnstile Linu... SKU : WCAM101119340603
    Special Price US$189.05 Regular Price US$210.06
  16. 4G LTE Cellular IOT Gateway Alarm Device Industrial RS485 Serial Port GSM GPRS Modem Modbus RTU M2M for SCADA OPC Server S275
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    4G LTE Cellular IOT Gateway Alarm Device Industria... SKU : RTUS275
    Special Price US$61.82 Regular Price US$68.69
  17. RFID UHF Gain 8dBi Antenna 865-867/902-928 MHz External Antenna 5M N-Female
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    RFID UHF Gain 8dBi Antenna 865-867/902-928 MHz Ext... SKU : HYANT8DB
    Special Price US$30.24 Regular Price US$33.60
  18. Counterfeit RFID UHF Sticker Label Wet Inlay UCode 7 23x11mm with Protected EPC and TID Tamper-proof
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    Counterfeit RFID UHF Sticker Label Wet Inlay UCode... SKU : U7-AZ-C7
    US$0.05
  19. 2m length rfid coil small antenna cable for test machine
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    2m length rfid coil small antenna cable for test m... SKU : HY909T
    Special Price US$6.72 Regular Price US$7.47
  20. LPSECURITY M2M GPRS GSM Network Modems RS485 Port For IOT Controller Remote Monitoring
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    LPSECURITY M2M GPRS GSM Network Modems RS485 Port ... SKU : USR-GPRS232-734
    Special Price US$43.68 Regular Price US$48.53
  21. 5-6 meters Long range EPC GEN2 R2000 uhf handheld rfid reader 4G Portable Bluetooth Warehouse invent
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    5-6 meters Long range EPC GEN2 R2000 uhf handheld ... SKU : 33040015780
    Special Price US$772.80 Regular Price US$858.67
  22. TCP/IP Color Screen Biometric Fingerprint And RFID Card Reader Door Access Control System Standalone
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    TCP/IP Color Screen Biometric Fingerprint And RFID... SKU : 32711738315
    Special Price US$34.10 Regular Price US$37.89
    Out of stock
  23. 50pcs T5577 EM4305 Copy Rewritable Writable Rewrite Duplicate RFID Tag Can Copy EM4100 125khz card
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    50pcs T5577 EM4305 Copy Rewritable Writable Rewrit... SKU : 32881579692
    Special Price US$25.20 Regular Price US$28.00
  24. Newest ACR39U Smart Card Reader Writer USB interface
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    Newest ACR39U Smart Card Reader Writer USB interfa... SKU : ACR39
    Special Price US$19.32 Regular Price US$21.47
  25. 10 Pcs Duplicator EM4305 T5577 Clone Proximity Badge Writable Rewrite Copy 125khz RFID Tag Card Stic
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    10 Pcs Duplicator EM4305 T5577 Clone Proximity Bad... SKU : 32957734872
    Special Price US$2.02 Regular Price US$2.24
  26. 50pcs RFID key fobs 13.56MHz proximity ABS key ic tags Token Ring nfc 1k china Fudan S50 1K chip
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    50pcs RFID key fobs 13.56MHz proximity ABS key ic ... SKU : 32234978694
    Special Price US$4.20 Regular Price US$4.67
    Out of stock
  27. 500pcs RFID key fobs 13.56MHz proximity ABS key ic tags Token Ring nfc 1k china Fudan S50 1K chip
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    500pcs RFID key fobs 13.56MHz proximity ABS key ic... SKU : 32235376319
    Special Price US$43.68 Regular Price US$48.53
    Out of stock
  28. RFID 134 2KHz + 125KHz Low Cost Reader Writer for EM4305 ISO1178485 Animal Tag Standard +Software FREE
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    RFID 134 2KHz + 125KHz Low Cost Reader Writer for ... SKU : GZ1342D
    Special Price US$128.03 Regular Price US$142.25
  29. 10pcs/lot NFC Tags Stickers Ntag213 13.56mhz Label Rfid Tag Card Adhesive Key Tags llaveros
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    10pcs/lot NFC Tags Stickers Ntag213 13.56mhz Label... SKU : 32795718006
    Special Price US$2.19 Regular Price US$2.43
    Out of stock
  30. 6pcs/lot NFC Tags Stickers Ntag213 13.56mhz Label Rfid Tag Card Adhesive Waterproof for Phones Samsu
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    6pcs/lot NFC Tags Stickers Ntag213 13.56mhz Label ... SKU : 32790227494
    Special Price US$1.34 Regular Price US$1.49
    Out of stock
  31. Waterproof NFC Tags Lable Ntag213 13.56mhz RFID Smart Card For All NFC Enabled Phone NFC Tags Sticke
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    Waterproof NFC Tags Lable Ntag213 13.56mhz RFID Sm... SKU : 32971403955
    Special Price US$0.33 Regular Price US$0.37
    Out of stock
  32. NEW RFID Active Tag 2.4G Long Range Key Ring Type Built-in Battery Rugged Waterproof
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    NEW RFID Active Tag 2.4G Long Range Key Ring Type ... SKU : KL2704C
    Special Price US$5.04 Regular Price US$5.60
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