LEDHOLYT Solar Power Bike Cycling Bicycle Headlight Front Lamp Rechargeable Battery for Outdoor Riding USB Charge Solar power,energy saving,environment friendly.Easy to install. 4pcs LEDs,ultra bright,low energy consumption,long life span. 2 modes of light,flash and steady light. Can charge with USB wire,buit in 3pcs AAA NiMH rechargeable battery,750mAh. Suitable for outdoor bike riding,install at the bike front bracket,provide brightnees and safety at night.