Diameter 22mm Tail switch power off shift drive board,Single lithium battery (2.9V-4.2V) battery input power supply Output 6V 8A,for SFT70 XHP70.3 6V LED lamp beads Low voltage warning and protection: When the battery voltage is 3V, it flash once every 30S, and it automatically shut down when it is 2.78V. Single-click to start: 36mA dim, 0.213A low, 0.581A medium, 1.802A high, 7.8A five-speed cycle, power-off memory of the current gear, double-click quickly to start flashing at any gear, 3 clicks to start SOS slow flashing for help, and then single-click to return to gear before double-clicking. Temperature protection: In the ultra-bright mode, when the temperature is higher than 55 degrees, it take 20 seconds to slowly drop to the high brightness mode.It automatically return to the original position at 50 degrees. Specifications Hign-concerned Chemical:none Diameter:22mm Plate thickness:1.6mm Weighs:10g Colour:As Shown Material:PCB Package Contents: 2 x Circuit Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.