Description: 100% brand new high quality! Metal aluminum alloy shell, technology is fashionable and bright. Made of aluminum alloy+highly elastic waterproof silicone material, which is stable, durable and has strong extension tension. Three switching modes. Installation or disassembly can be done in 3 seconds without any tools. Silica gel is cold-resistant and heat-resistant, and can be used safely at low temperature-0 degrees or high temperature-60 degrees. The outer layer is coated with highly elastic waterproof silica gel, which is stable, durable and has strong extension tension. High-elasticity silicone multifunctional fixing method can be installed on handlebar, seat cushion standpipe, front fork, rear upper fork, rear backpack and safety helmet. It is fixed behind the safety helmet and can be used as a warning taillight. It can be used continuously for 35 hours in full brightness and 160 hours in flashing. The effective visibility of warning is over 600 meters. Quick-release design, which can be installed or disassembled in 3 seconds without any tools. Emergency lighting, outdoor play at night, mountaineering lighting and bicycle lighting are all suitable. Water-resistant and rain-proof design, not afraid of flooding in rainy days. Specifications: Product: gem riding taillight safety warning light Dimensions: 2.5*2.5*3.4cm Colors: black, blue, silver and red Material: aluminum alloy+silicone Power supply: two 2032 batteries Flash mode: always on/flash suddenly/flash slowly Package Included: 1* taillights