Both the switch and tracer has usb charging fuel gauge and one button operation the new daybright pulse pattern is designed to cut through the distractions of busy roads and visual noise in modern motoring and is visible from over a kilometre away even in the brightest of sunlight the qr brackets make them easily removable to add to your bike for daily use in the box switch tracer handlebar mount seatpost mount 2 x micro usb charging cable quick start guide specification run time sw