[3 LIGHT MODES WITH REMOTE CONTROL] This bike alarm tail light have 3 light modes, Mode 1: Normal Flash, Mode 2: Breathing Flash, Mode 3: Steady On, you can change any modes that you like easily, with the remote control or short press the button on the bike tail light.[ANTI-THEFT ALARM BIKE TAIL LIGHT] The cycling security alarm can make a loud sound(115 dB) to draw people's attention and deter the thieves. Distance in the open, the remote control operating distance up to 50m(164 feet), easily find your bike location through light or sound.[SMART BRAKE SENSING REAR BIKE LIGHT] Designed with the brake sensor, Automatic ultra-bright brake light will automatically light up after braking. The bicycle light is super bright and highly visible from a distance, really catch attention to enhance your safety. The brake sensor function works on all the light modes.[LIGHT PERCEPTION BIKE BACK LIGHT] The light perception function will work when the bike taillight in the normal flash mode or breathing flash mode. If you drive in a dark environment, the taillights will automatically turn on, After leaving the darkroom, the bicycle does not move and vibrate for 30seconds, the taillights will turn off automatically. if you do not need this function, just use the steady on mode.International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.