... colors are available, Precious Gold, Classic Black, Elegant Silver, Light Blue, Moon Green, Charming Red, Hot Orange, and Mysterious Purple. 3 ... Variable voltage available Three voltages available: red light(3.6V); orange light(3.8V); blue light(4.2V)3) Short-circuit protection When ... short circuit, MOS tube turns off automatically, the LED light twinkles three times. 4) Low voltage alarmIn case of ...