[Product size] 26*26*4 cm.[Safety guarantee] Light and water cycle fails. USB charging allows you to ride at night.【More modes ↑ ↓ ← →】Wireless control of 4 signals (left, right, forward, stop), when rotating, just press the corresponding button on the remote control without wire on the handlebars to remind you to overtake and tell others how you did. You want to turn without using arm signals.【Signal Remote Control】Connect wirelessly to the bike handlebars for easy control.Easy to assemble: place the jacket directly on your back or backpack and adjust it with 2 adjustable straps and two belts.Breathable back pocket: Padded mesh back pocket stores your cards and cash while improving breathability and comfort .Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.< /p>