*　AC/DC power supply selection
*　Rechargeable battery 6V4.5AH
*　Discharge time is approximately 　Single tube: 4 hours　/　Double tube: 2 hours
*　 Power failure emergency function
*　Handle/seat/wall
*　Single and double tube selection
* charging indicator
*　Luminous indicator
*　 Volume: 160 (L) * 76 (W) * 764 (H) mm
*　Package specification: 1*3 sets