1. Recording time: 11 hours 2. Storage time: 36 hours / 70 hours 3. Recording format: WAV 4. USB: Hi-Speed at ?? to ?? USB2.0 5. Battery: 130MA 6. Size: 72 x 21 x 13 mm 7. Weight: 15g Instructions 1. System settings (time synchronization function): connect the computer USB, open the U disk, click the running software SetTime.exe, you can synchronize the time, format: year-month-day-hour-minute-second. Note: The battery is completely discharged. You need to run the SetTime.exe software again when using it again. 2. On/Key: ON (initial recording): red light stays on ?? red light flashes 3 times a ?? off light a ?? start recording, OFF (save on power off): the red light flashes 1 time at ?? Save 3. Play the recording: The product is turned off. Connect the computer's USB and the computer plays the recording. 4. Charging and recording function: When the power key is ON, connect the computer USB or charger to charge and record. 5. Charging: the product is in the off state, connected to a computer USB or mobile phone charger, the red light flashes in the charging state, and the red light is always on. Note: This product contains a charging protection function. When the battery reaches 90%, the red light is always on. If it needs to reach the fully charged state, the charging time will be: 1 hour.