Note: Please keep your fingers away from the microphone hole, otherwise the sound may be reduced. Features: Detects voice and conversations, and sends immediate alerts. Equipped with a professional dual-microphone design that operates independently while working in coordination. Supports configuration of multiple contact numbers with sequential callback function to ensure reliable emergency notification. High-definition o quality powered by imported voice chip for seamless communication. Includes privacy protection: device can only be accessed by authorized numbers, helping prevent unauthorized access. Offers multiple alert modes including SMS and phone calls, providing continuous monitoring and periodic voice status updates. Suitable for use as a car alarm or home monitoring security device. Specification: Item type: Voice Recording Device 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 Recording Device (SIM card not included) 1 x USB Cable 1 x Charger Adapter