PRODUCT DESCRIPTION The product shell is made of ABS plastic High brightness and low power LED hulb. The LED floodlight type of lamp bead Use 3xAAAbattery INSTALLATION The product shell is made of ABS plastic, High brightness and low power LED bulb. This is a floodlight type of lamp bead Use 2xAAA battery Battery installation: Open the bicycle warning light from the middle, put two batteries, and then combine the bicycle warning lights. INSTALLATION METHOD SEAT POST BRACKET 2AAA BATTERY BRACKET QX-T0198 TO INSTALL HEADLIGHT: MOUNT THE HEADLIGHTS ON THE HANDLEBARS AND LOCK THE RUBBER STRAPS ON THE HOOKS QX-T0108 HOW TO INSTALL THE TAILLIGHT: FIX THE TAILLIGHT CLIP ON THE SEAT BAR, TIGHTEN THE SCREWS, AND INSERT THE TAILLIGHT INTO THE TAILLIGHT CLIP