Features:1. Strong magnetic adsorption, can be attracted to iron metal materials2. Recording at a distance of about 60 meters3. Small size, can be hung on the belt or key, easy to carry4. OTG connection technology, support mobile phone/computer connection transmission to watch video and play voiceProduct parameters:1. Material: metal, plastic, electronic components2. Transmission interface: USB 2.03. Video format: AVI format4. Recording format: WAV format5. Frequency: 24 Hz6. Video power: 109mA7. Recording power: 85mA8. Built-in lens: camera9. Built-in MIC: non-directional capacitor microphone10.S\N (noise ratio): 90b B11. Built-in battery: 320 mAh lithium battery12. Battery life: 3.5-4 hours13. Charging time: 2.5-3 hours14. Rated voltage: 3.6-4.2V15. USB input rated voltage \ power: 5V300MAH-5V1000MAH16. Operating temperature: minus 40-60 degrees Celsius17. Dimensions: 6.1 x 3.8 x 1.25cm18. Weight: 200gPacking List:Data Cable x 1Instruction Manual x 1Warranty Card x 1Recording Pen x 1