GSM Sim Card Voice Activate Two-Way Auto Answer Listen Audio Bug Surveillance Device


  • Two way GSM Audio Bug / Listening Device / Security Monitor Great for collecting proof / evidence. 
  • This two-way GSM audio device calls you when it detects sounds. Simply insert a GSM SIM card and program it to your desired phone number for call back. Use in the bedroom, living room, conference room, office and car.
    This two-way audio device comes with two amazing functions 
  • Make a call to the audio device and you can instantly listen in to conversations. The built-in microphone works up to a 7-meter radius.
    Allows the audio device to call you when it hears people talking 


  • Super mini size, easy to carry and to be hidden. 
  • Very easy to operate: just make a call to the SIM number which is installed in the device you will can hear nearby voice within 7 meters in a few seconds. 
  • GSM Quad Band (850/900/1800/1900Mhz), can work perfectly around the worldwide. 
  • Built-in 2 Mic to ensure the good sound quality, prominent sound quality. 
  • Supports pre-setting number, telephone number and mobile number. 
  • Work frequency:850Mhz/900Mhz/1800Mhz/1900Mhz   
  • GSM voice/Audio monitor Bug. Compatible with All GSM SIM card
    Prominent sound quality. 
  • Voice activation: Can call back to your phone automatically when sound
    nearby is up to 45DB
    You can send message command or cancel voice activation function by SMS “1111 or “0000”” 
  • Open the back cover and insert Sim card into the holder and device automatically boots
    Boot light is 3 seconds. after the lights goes off you can dial the sim card number
    Number of settings: call the sim card number with mobile phone or telephone then hang up for setting success
    Voice feature: Send 1111 message to the sim card number then sound activation is open
    Send 0000 message to the sim card number then sound activation is closed
    The flash of red light indicates the SIM card is correctly inserted 
  • SIM will complete initialization and maintain in stand-by status and the light will be off 
  • Dial the SIM card number after 5 rings hear the sound around device 
  • Charging method: When the device is charging Red light is flashing until fully charged and Red LED light stays on


  1. Two-Way Audio Device
  2. 1x USB Cable 

Technical Specifications

  • Tri-band GSM Two-Way Audio Device  
  • Continuous Power Supply Connected: 24 hours Non-stop
    Microphone Range: 5~7 meters radius  
  • Working Temp: -40~50’C
    Responding Frequency: 1Khz~18Khz 11.  
  • Standby time: 2-3 days
    (If Acoustic Alarm function Off standby time:10-12 days) .
    Working Time:5 hours  

Materials: Molded Plastic
Color: Black
GSM Frequency Compatibility: Tri-band (850MHz,900MHz, 1800MHz, 1900MHz)
Built In 200mAh Rechargeable Li-ion Battery
Dimensions: 4.3x 3.2 x 1.4(cm)