Rechargeable GSM Voice-Detection Listener

Size: 4.3 x 3.2 x 1.4 cm. Powered by a 400mAh rechargeable Li-ion battery — delivers 5–8 days of continuous voice-triggered monitoring or 16–21 days in low-activity positioning mode. Charging is performed via the included USB cable. Supports GSM tri-band operation: 850 / 900 / 1800 / 1900 MHz. Integrated microphone captures clear audio up to 7 meters away. Functions in real time: detects voices or environmental sounds and dials your pre-set number automatically — enabling immediate live listening without user input. Setup is hardware-only: insert a GSM SIM, store your number, and activate — no software, no updates, no external dependencies. Engineered for low visibility — its diminutive footprint allows natural integration into everyday objects and surfaces. Suitable for lawful use cases requiring ambient audio awareness across multiple indoor zones. Includes one listener unit, one USB charging cable, and printed instructions. Note: Compliance with local laws governing surveillance devices is the sole responsibility of the buyer.