·【Please turn on the taillights before remote control】The switch is on the side.

·【ULTRA-BRIGHT BIKE TURN SIGNALS】ROCKBROS bicycle light bright up to 80 LM, It is great if you ride on roads whether day or night as the bike back lights is very bright so it lets the cars behind you know you are there and when you are going to turn.(with black tape over the light sensor if you want use in day time)

·【WIRELESS REMOTE CONTROL】Easy Installed it on the handlebar by rubber strap, switch the lighting modes of the bike rear light by press the four buttons on the responsive remote.（need turn on bicycle tail light by tiny switch on the side）Total six lighting modes: (Steady on/ Fast Flash/ Flowing Light/ Turn Left/ Turn Right/ Ground Line).

·【BRAKE SENSE LIGHT & GROUND WARNING LINE】The light will hightlight to remind the cars and pedestrians behind you when braking. Unique ground warning lane warns any possible incoming vehicle, providing riders with their own virtual lanes to further increasing visibility.

·【USB RECHARGEABLE】Built-in a 2000mAh rechargeable battery, keep running for 5-10 hours under the flashing light mode after fully charged. The remote controller equipped with a CR2032 replaceable coin cell battery and it can keep working for 12 months.