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,90mAh Charging interface:-USB Charging time:60 minutes Charge voltage:5V1A Using time:8 hours when flashing :4 Pcs Colour:Black Material:ABS Size:3.9x2.7x1.3CM Package Contents: 4 * Bike Light Only 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.