1、Made of qualified nylon material, lightweight & durable. 2、​Battery capacity 650mAH, wireless frequency: 2.4GHZ. 3、With 300cm wireless remote distance, safely use when you are riding. 4、​It has USB port, easy to charge, provides safe warning at night and smoggy weather. 5、​The wireless signal does not interfere with each other, helps you to remind drivers for keeping their distance. Features: Made of qualified nylon material, lightweight & durable. Battery capacity 650mAH, wireless frequency: 2.4GHZ. With 300cm wireless remote distance, safely use when you are riding. It has USB port, easy to charge, provides safe warning at night and smoggy weather. The wireless signal does not interfere with each other, helps you to remind drivers for keeping their distance. Specification: Condition: 100% Brand New Item Type: LED Signal Light Vest Material: Waterproof Polyester Communication mode: wireless frequency 2.4 GHZ Control distance: 3m Working time: 20-30H Charging time: 3H (with LED indicator) Remote control battery: 2 * CR2032 (built-in) Battery: 4.2V 500Ah lithium battery Indicating Type: Left, Right, Forward, Stop Size: Approx. 25 * 25cm / 9.8 * 9.8inch Weight: Approx. 370g Package List: 1 * LED Signal Light Vest 1 * Remote Control 4 * Belt 1 * USB Cable 1 * User Manual