This is a quality bicycle rear lamp, with 5m remote distance, you can use the remote controller to turn on the lights according to road conditions and steering requirements. 6 light modes adjustable, left turn signal, right turn signal, red light keep on, red light flash, all lights flash, parking light, easy to adjust and very convenient. Built-in high decibel loudspeaker for warning, more safety for night cycling. Features: Compact size, light weight and portable, easy to put into pocket or car bag and carry with you. 5m remote distance, you can use the remote controller to turn on the lights according to road conditions and steering requirements. 6 light modes adjustable, left turn signal, right turn signal, red light keep on, red light flash, all lights flash, parking light, easy to adjust and very convenient. Select quality LED light beads, 80 lumens high brightness, suitable for using in dim light environment. Built-in high decibel loudspeaker for warning, more safety for night cycling. Built-in rechargeable lithium battery, support multiple USB quick recharging ways. Waterproof design, suitable for complex weather like rainy or snowy days. Specifications: Name: Rear Lamp Material: ABS Battery: 1 * 3.7V, 650mAh lithium battery (included) Item size: Lamp size: 96 * 34 * 21.5mm / 3.78 * 1.34 * 0.85in Remote controller size: 55 * 45mm / 2.17 * 1.77in Item weight: 44.5g / 1.57ounce Package size: 150 * 120 * 32mm / 5.91 * 4.72 * 1.26in Package weight: 125g / 4.41ounce Packing List: 1 * Rear Lamp 1 * Remote Controller