【ADVANCED DESIGN】330mAh rechargeable lithium battery, charge via USB with supplied cable (power bank, computer, AC/DC adapter). 【BRIGHT LED LIGHTS】5 long-lasting SMD LEDs per light; colors as shown (1 red, 1 green for bow sides, 1 white for stern); 4 modes: full brightness, chase mode, quick chase mode, flashlight mode. 【EASY INSTALLATION】One-touch dismount button, silicone mount strap with 4 buckle positions for snug fit; adjustable hinges on bracket for correct angle. 【APPLICATIONS】Navigation light for boats, pontoons, kayaks; safety light for bikes, helmets, skateboards, strollers, wheelchairs, dog collars, backpacks; suitable for walking, running, fishing, camping, hiking. 【PACKAGE INCLUDES】4 safety lights, each with USB charging cable; 2 safety whistles (double tubes, loud 120dB); 2 reflective lanyards, 1 roll waterproof tape. Lifetime support available for questions.