Specifications Brand: UltraFire Model: WF-139 Input 1: AC 100-240V / 50-60HZ Input 2: DC 12V / 400mA Output: DC 4.2V / 450mA Application: For rechargeable battery 18650(but not for the one with protection board),14500,18500,17670,17500 While Charging, the red and green lights flash alternately. After fully, green LED stays on. Color: Black Net weight: 138g Package weight: 149g