This recorder has simple one-key recording and long-term recording functions-no software installation required. It can not only record, but also can be used as a normal USB flash drive. A powerful recording pen provides great convenience for classroom recording, meeting recording, and note recording. After being fully charged, it will continue to provide long-term playback and recording mode. Rechargeable lithium ion battery. Support TF card, maximum 8GB. (Excluding memory card) Item type: U disk digital recorder Material: Plastic + Metal Color: Black Size: 70219.4mm/2.760.830.37in (approximately) Recording format: WAV Power supply: Lithium-ion battery Working system: Windows 2000/ XP/Vista/Win 7 Recording bit rate: 28K bps USB port: USB 2.0 Support TF card capacity: 2-8GB (not included) Frequency response: 20Hz-20KHz Maximum audio output power: 5mW Working temperature: 0 ~40 Quantity: 1 set (not including demonstration of other accessories in the picture)