Five Mode: full light 100%, 50%, 25%, burst flash, SOS. Subminiature: 10 * 10 * 2mm Shift mode: power switch trigger. Switch once changed once, and loop to switch. Three dry batteries or a lithium battery can drive 3W-5W LED lights. Chip through the switch closed and disconnect, to transform the output mode, in order to achieve brightness adjustment and flash function. Tip: Peripheral with two MOS tubes, two resistors and one capacitor. 2.5-5V can drive 10W LED lights, and comes with brightness adjustment and flash flash and SOS function. ● Features: ★ green - chip using lead-free package, alloy material, effectively improve the reliable quality of the product. ★ five cycle mode - through the switch control, can achieve full light, 50% brightness, 25% brightness, flash, SOS, five modes of cyclic conversion function to meet the needs of different purposes. ★ high efficiency - chip efficiency up to 92%. ● Product use: ★ Suitable for battery-powered LED flashlight, headlights and other electronic equipment ★ need to drive high-power LED lights on the application program. Adjust the resistance of the size of R, you can adjust the LED current, the smaller the resistance value, the greater the LED current. Please pay attention to the resistance of the power, so as not to burn the resistance and IC. This program, the maximum drive current of 1.4A.