1.Work time can last about 12 hours for blinking function, and around 4 hours for constantly on function after fully charged.
2.Micro USB terminal for charging ; additional USB terminal for emergency charging for others.
3.Letters can be customized according to requirement. STOP/SLOW/GO/PARE/SIGA,etc.
4.Built in tilted sensor. When power on, the paddle light up when you raise it and off if tilt.
5.Battery changeable design, simply screw the bottom of the handle, and pull out/push in the battery case.