This product is laser function included. Tired with the normal taillight? This Basecamp Intelligent bicycle taillight with remote indicators can make you feel so cool Wireless remote control left / right position switch With IPX4 waterproof design, anti-rain (Do not do it in the water!), no need , on the rainy day to worry. Ideal for outdoor activities such as cycling / walking Easy to install and use super. Ideal for outdoor activities Features: Automatic Switching SystemThe rear light power is turned on if it is daytime,after 10 seconds it goes out into standby state,trough the tunnel at the time of the night or the environment,the rear light will automatically light up.BaseCamp applies high quality rechargeable lithium batteries to make sure that the light has 5 hours working time.USB Rechargeable–Charges from your computer or any device with a USB port. It is switched off after fully charged and have a long battery life Specifications:. – material: PC + ABS -Color: Black – Weight: approx 125 g – size: 110 x 45 x 30 mm (LxWxH) – Luminance: 85 LM – Waterproof: IPX4 (splash water in any direction, without harmful effects) – Light Color: Red Taillight / Yellow Cornering – Taillight Battery: Lithium Batteries 2200mA – Remote Control Battery: Coin Cell Package Include: 1 x BaseCampï¾® Intelligent Taillight 1 x Remote control 1 x Light Holder 1 x USB Cable 1 x Rubber Fender 1 x Elastic 1 x English User Guide If you have any question, please do not hesitate to contact us, we take full ownership and responsibility for the quality of our products and do our best to help you solve the trouble.