ZDD Packing list: 1 x remote control turn signal 1 remote control 1 x fixed base 1 x USB charging cable Size:88*19*30mm Features. New Bike Tail Light --- Aesthetically pleasing: sleek streamlined design in solid material, compact size: 30 grams, 8.8 cm. Powerful - 100 lumens lab tested output with 38 COB LEDs giving you 270 beam angle and 492 feet visibility for added safety Basic: IPX-5 waterproof and USB rechargeable built-in lithium battery. Multifunctional trio: it is not only a bike tail light with a constant light/flash mode, but also a bike signal and brake light adjustable via wireless remote control. Multiple modes versatile ---- tail light 3 modes: constant light, flashing and strobe; 2 modes as bike turn signal: left and right turn (automatically returns to previous mode after 15 seconds); 1 brake light mode: high brightness constant light, activated by remote control. Good battery life with USB rechargeable battery ---- 2 hours charge = 4-10 hours battery life (depending on operating mode). For fast charging, simply connect the cycling light to any USB device, such as a mobile power supply, car charger or AC power outlet adapter. (Please fully charge the bike tail light before first use.) Suitable for all bikes: easy to mount on seatpost (light unit) and handlebars (remote control) with flexible silicone mounting straps, suitable for all kinds of bikes, road bikes, mountain bikes, mountain mtb, hybrids, also as helmet light, bike wheel light, backpack light, wheelchair light, scooter light and warning light.