1. Built-in rechargeable battery ,3.7V/1200mAH ,It lasts about seven hours.

2.DC 5V charge ，charge time for 2.5 hours.

3.Built-in 24 different sounds.

4.Timing function:30,60,90 minutes.

5.Fade-out function of timing playback: during the timing playback, the sound gradually decreases automatically until it shuts down automatically.

6.Memory function: the machine will remember all the current Settings before the shutdown, the next boot does not need to be reset.

7.The sound plays in a continuous loop.

8.Low electric alarm function: red low telegraph alarm lamp flashing slowly

9. Product Certificates: CE, ROHS, FCC, MSDS, UN38.3