Spy Bug will call you when it hears talking or increased activity. Just send a text to the secret spy device and it will call you back. Put the phone down when you have finished listening & it will call you again when there is more activity. You can hear this GSM spy device from anywhere, you just insert your GSM sim. When you call the mobile number, this device will auto answer. You can hear talking or whatever you are listening for when you call in to the sim card. Useful at home with the babysitter, teenager ect. No flashing lights or sounds when activated by your call.

GSM Frequency Compatibility: Quadband (850MHz, 900MHz, 1800MHz, 1900MHz)
Onboard Buttons/Slots:
- USB Input
- LED Light
- LED Light Button
- Two Way Switch
- MIC
- SIM Card Slot
Power: Built In Rechargeable Battery
Standby Time
Auto voice activated mode upto 3-5 days
Standard mode 6-15 days
Standby Time depends on call time.

Dimensions: L:52 x W:40 x H:15 (mm)
Package Includes: Call Back Spy Device, Usb charging cable, UK USB Mains adaptor for charging, Basic Instructions.