1. Recording time: about 18 hours when fully charged (depending on the environment) 2. Battery: Built-in 110MA-3.7V rechargeable lithium battery 3. Charging time: about 2 hours (red light is on blue light is on when charging) 4. Recording file format: WAV 5. Recording and sampling speed record: 48KHZ 6. Bit speed: 192KBPS 7. Size: 65x20x8MM 8. Weight: 14g Instructions: 1. Use as a USB flash drive when turned off and as a recording pen when turned on 2. Turn the switch down. After the red light stays on it flashes off for a few times to start recording. It does not turn on during recording. 3. To end recording turn the switch up the red light flashes once recording stops and saves 4. When the computer is powered off connect to the USB port of the computer and click the file to play save delete etc. 5. The unit has a time synchronization function and the property" of the recording file is displayed as the current recording time. product manual: 1. Charging: When the USB pen r