H81 Night Vision Voice Recorder Noise Reduction Audio Recorder HD WiFi Recording Device for Lectures Meetings •WiFi recorder with point-to-point WiFi,app mobile real-time viewing •HD 1080P,a key recording,video,photo,support for charging and recording,cycle coverage,maximum support for 256G (card not included),with infrared night vision supplemental light •With a lanyard,can be hung on the chest •With a back clip,can be adjusted positively and negatively,clip clothing pockets,schoolbag belts,waist,etc.,easy to carry •Suitable for meeting training,outdoor hiking,cycling,classroom recording,running sports,interview recording,business negotiations •Can be fixed with a bracket,connected to the computer as a webcam •Specifications: •WIFI program: Roadcam •Video format: AVI •Video resolution: 1920*1080P •Video frame rate: 30FPS •Image format: JPG •Pixel: 4032*3024 •Image ratio: 16:9 •Interface type: Type-C USB •Charging time: 3-4 hours •Usage time: battery capacity 1200 mAh,6 hours of recording alone,8 hours of recording alone •Operating system: for iOS/Android,windows 7 or above •Image sensor: 1/4 inch CMOS sensor •Minimum illumination: 0.3～0.5Lux (color mode),0Lux (black and white mode) •Viewing angle: 90° diagonal •Night vision: automatic switching of lens sensitivity,6 940nm SMD infrared lights,illumination distance of 3 to 5 meters •Compression standard: AVI •Code rate: CBR/VBR two code rate control modes,and the output code rate range is 128~4096kbps •Image adjustment: brightness,contrast,saturation,and hue are adjustable •Input: Built-in -38dB microphone •Output: None •Sampling frequency/bit width: 8KHz/16bit •Compression standard/code rate: ADPCM/32kbps •Alarm detection: red and blue warning lights •Rated voltage: DC5V±5% •Power consumption: 150-170ma •Working environment: working temperature: -10～50℃,working humidity: