Long press (2 seconds) to switch the machine, short press to adjust the mode.Mode:seven- flashing, seven-color slow flashing, seven-color SOS mode, seven-color always-on, civil aviation mode, mode, etc.35 modes with memory function.Portable and durable, easy to carry and light weight.USB charging interface, no need to destroy thecircuit of the aircraft.Easy installation, come with two fixing methods, Nylon Sticker and strap.Built-in battery:3.7V,90mAhCharging interface:-USBCharging time:60 minutesCharge voltage:5V1AUsing time:8 hours when flashing:2 PcsColour:BlackMaterial:ABSSize:3.9x2.7x1.3CMPackage Contents:2 * Bike LightOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.