Note: Please keep your fingers away from the microphone hole, otherwise the sound may be low. Features: Detects voice and conversations, and sends alerts when sound is detected. Dual microphone design for independent and coordinated operation. Supports multiple phone number settings with sequential dial-back functionality for reliable emergency notification. High-definition sound quality with imported voice chip for clear, seamless communication. Privacy protection: Device can only be operated by authorized numbers, helping prevent unauthorized access. Multiple alert modes including SMS and phone calls for continuous monitoring and periodic voice status updates. Suitable for use as a car alarm or home monitoring device. Specification: Item type: Voice Recorder Material: Plastic Color: Black Voltage: 100-240V Plug: EU Plug Power supply: Lithium battery (USB charging) Antenna: Yes Microphone Quantity: 2 Effective Range: 10m Working mode: SIM GSM Response frequency: 1.2-800kHz Standby time: 2-3 days Application Scope: Automobile, household, etc. Size: 4.4*3.3*1.3cm / 1.7*1.3*0.5in Weight: Approx. 126g / 4.4oz Package list: 1 x Voice Recorder (SIM card not included) 1 x USB Cable 1 x Charger Adapter