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Features: Exclusively unique design Using brighter LED lights in high quality( 10 led lamps) Tool-free installation, simple and easy to install Micro USB charging interface, convenient in use Three modes: rapid / pulse / constant mode Continuous use for more than 8 hours after full charge Specifications Mounting Placement: Seatpost Material:ABS plastic Color:Red Dimension:Approx. 6.5cm x 2.5cm x 5.7cm Weight:Approx. 38 g Package weight:Approx. 48g Package Included: 1 x Bicycle rear Light 1 x charge cable 1 x mounting bracket