Specifications:
Product name: 7135x3 AK47A Circuit Board
Model:AK47
Size: Board diameter:17mm
PCB thickness: 1.2mm
Input voltage:3.0v-4.2v
The maximum current:1A
2-Mode: Low 10%--High 100%
3-Mode: Low5%--Middle30%-High100%
5-Mode: Low5%!#!amp!*!mdash;Middle30%!#!amp!*!mdash;High100%!#!amp!*!mdash;Strobe---Police Flash!#!amp!*!mdash;SOS
Suitable LED:Single core LED flashlight(white\/blue\/purple light)

Features:
It's with reverse polarity protection.
Low voltage indication function. If the voltage is lower than 2.9V-3V， it will reduces the minimum brightness automatically. And will prompt you by flash once a second.
Power supply by Single lithium battery or 3xAA battery. It's the best when Input is more than Output about 0.2V-1V. This section can be efficient， and can also constant current.

Please note:
The drive current is not higher than the maximum current of LED lamp.

Package Included:
1x 7135x3 AK47A Flashlight Circuit Board