HD recording with zero noise. Automatically saves recording when powered off. HIFI MP3 music playback. Fully charges in 30 minutes. Supports continuous recording for up to 38 hours. Silent recording with no light display or vibration. Features rapid charging and fast forward/backward playback. Time setting function for accurate recording timestamps. Suitable for use in schoolbags, collars, drawers, inside vehicles, and similar locations. Simple design for easy and convenient operation. Color: Black Memory Capacity: 32GB Body Material: Plastic Recording Format: WAV Recording Mode: One-touch recording, one-touch save, one-touch playback/pause Microphone: Built-in HD microphone Sampling Rate: 48kHz Bit Rate: 192kbps Battery: Built-in eco-friendly lithium battery USB: Mini USB Package Contents: 1 x Voice Recorder Note: Other items not included. Color may vary slightly due to lighting and screen settings. Measurement error allowed within +/- 1-3 cm.