main featues :                                                                                                   
1. light on /off button :contral the light  on /off status 
   L.mode  button :9 modes  and the first mode  is the default one 
   S.mode button :  radio and switch button ,8 natural sound for your choice 
   S.VLbutton :    sound dimmer button with totall  4 level for volume                                          

2. DC 5V/400mA adaptor for recharging   ,built-in rechangeable lithium battery3. Can be Rechaged with red indication light on ,when it is fully rechanged the indication light will be green