This two-way GSM device alerts you when it detects sounds in its vicinity. Simply insert a GSM SIM card and program it to your desired phone number for callback. The device features a built-in microphone with a pickup range of up to 7 meters. Key features: - Call the device remotely to listen in to surrounding o in real time - Device can automatically call a pre-programmed number when sound is detected - Tri-band GSM compatibility (850/900/1800/1900 MHz) - Built-in 400 mAh rechargeable lithium-ion battery - Voice-activated mode provides continuous operation for 5–8 days - USB charging capability Specifications: - Primary Function: Tri-band GSM Two-Way o Device - Material: Molded Plastic - Color: Black - Microphone Range: 5–7 meter radius - Power: Built-in 400 mAh Rechargeable Li-ion Battery - Dimensions: 4.3 x 3.2 x 1.4 cm Package Includes: 1 x o Device 1 x Charging Cable 1 x User Manual Note: This product is designed for legal use only. Users are responsible for complying with all applicable laws and regulations regarding the use and ownership of o recording devices in their respective countries. The seller assumes no liability for illegal use, customs issues, or any consequences resulting from improper use of this device.