Item Type: Mini Camera RecorderMaterial: ABSResolution: 1080PVideo Format: AVIImage Format: JPGLens Accuracy: F NUMBER 2.25Built in Polymer Lithium Battery: 300mAhPackage List1 x Mini Camera Recorder1 x Charging Cable 1 x Instruction ManualManual measurement, please allow some errors.1[Large Range] Mini camera recorder with all round stereo sound pickup technology, 100m/328ft high definition distance, pick up the sound to start recording, regardless of environmental restrictions. 2[Noise Reduction] Small camera recorder built in quad core DSP digital noise reduction technology, adding physical soft glue for different noise environments to eliminate and filter various noises. 3[Wide Angle Lens] Mini video voice recorder with built in 110 degree wide angle coverage lens with high definition wide frame, 1080P high resolution, and support for AVI video format. 4[Voice Activation] Support voice activated recording, recording when there is sound, no sound automatically pause, save storage space, filter invalid clips, reduce playback time recording. 5[Auto Save] When the system detects low battery power, the HD camera recorder will save the file and automatically shut down to ensure that video and audio data is not lost when charging.