Come and see our amazing products. It can charge your cell phone and USB tail light , So your electronic device on the bike has a steady stream of solar energy .Universal USB output 5V Voltage, 0.5A Current.5 sounds ,140 dB loud Speaker ,Long press 5 seconds to change bell sound .Very Loud.Built-in 2000mAh high quality rechargeable lithium battery, Environmental protection, Save your money,Safe and Efficient .Max 350 lumens :Effective distance 600ft front bike light ,Ultra bright ,4 Mode and Light perception control mode.Click button to change mode. Waterproof , rainproof, No worry about rain.USB rechargeable, 4 mode, waterproof, Horizontal or vertical installation, Up and down 45 degree angle adjustable, Easy to install and remove Pls confirm further with us if any query about packing info, inventory status and time schedule.