*.Automatic Red X ray sense,dual flush and half flush,for saving water. *.Can sense body within effective distance.Starting to count time when the red light opens.The flush Valve won't work if the time is less than 10 seconds;within 10 seconds - 60 seconds, the half flush works;when more than 60 seconds,the full flush works.The said time can be adjusted according to your requirement if needed. *.Flush volume adjustable for both Full Flush and Half Flush.8-level switch suits most toilet tank. *.The Sense Window is stuck on the inside face of the toilet cover.When the cover is sealed,the Sense Window cut off power automatically. *.Power Serving Method:by DC6V battery,or choosing transformer to change alternatiing current 220V to 6V. For more information please kindly contact me directly.We are sincerely hope can establish long-tern busines relationship with you.We shall supply you and your company our best service.