Features:
1. Built-in rechargeable battery,3.7V/1200mAH ,10-12hours playtime
2. DC 5V charge,charge time for 2.5 hours
3. Built-in 24 different sounds: (6 white noise + 6 fan sounds + 12 natural sounds).

4. Timing function:30,60,90 minutes and continual play
5. Speaker Spec: 52mm 2 ohm 5W
6. Frequency response: 65HZ - 20KHZ

7. Memory function: remember the last Settings records

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

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