Features - Color: Black - Material: Plastic, Metal - Size: 7.2 x 2 x 0.8 cm / 2.83 x 0.78 x 0.31 inch - 10m remote recording, up to 20 hours of continuous recording, DSP noise reduction - Can be placed in wallet, bag, car, pocket, on table, etc. - Password protection for secure recording - Suitable for business meetings, negotiations, interviews, lectures, conferences, classroom sessions, group discussions, and more - A-B repeat function supports listening, learning, and practice Specification Maximum number of recording segments: 999 Operating temperature range: -5 to 40 degrees Celsius Recording frequency response range: 8 kHz to 48 kHz Recording distortion: 0.05% Signal to noise ratio: >80 dB Maximum output power: 300 mW Supported audio formats and bitrates: MP3 (8–320 kbps), WMA (32–192 kbps) Battery: 3.7V / 200mAh TF card support: 1GB–16GB (not included) Display: 1.2-inch OLED USB standard: USB 2.0 High-Speed