This is a quality bicycle tail light, with a distance of 5 m, you can use the remote control to turn on the lights according to the road conditions and steering requirements. 6 adjustable lighting modes, left turn signal, right turn signal, red light on, red light flashing, all lights flashing, parking light, easy to adjust and very practical. Built-in high-decibel speaker for warning, more safety for night cycling. Features: Compact size, light weight and portable, easy to put in a pocket or car bag and carry with you. 5m remote distance, you can use the remote control to turn on the lights according to the road conditions and steering requirements. 6 adjustable lighting modes, left turn signal, right turn signal, red light on, red light flashing, all lights flashing, parking light, easy to adjust and very convenient. Select quality LED light beads, 80 lumens high brightness, suitable for use in low light environment. Built-in high-decibel speaker for warning, more safety for night cycling. Built-in rechargeable lithium battery, support multiple ways of fast charging USB. Waterproof design, suitable for complex weather conditions such as rainy or snowy days. Specifications: Name: Tail Light 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 Control Size:55 * 45mm / 2.17 * 1.77in Item Weight: 44.5g / 1.57ounce Package Size: 150 * 120 * 32mm / 5.91 * 4.72 * 1.26 inches Package Weight: 125g / 4.41 ounces Packing List: 1 * Tail Light 1 * Remote Control