USB 3-in-1 Speedometer + Headlights + Horn Bicycle Computer 3 Mode Horn Flashlight Led Front Lights Cycling Headlight

Features:
800 lumens bike headlight gives you perfect visibility and keep safe distance in the dark.
Bike speedometer with accurate tracking on speed and distance helps you to get more fun of your cycling trip or easily achieve your fitness goals.
120dB speaker provide a clear warning for passers-by riders and cars. 3 sounds can be selected to switch.
Independent split-type wire control switch, pluggable design, connected through USB port, can control the lighting and speaker.
T6 double lamp bead, one lamp or double lamp can be switched, a total of 4 lights mode.
The battery has a capacity of 4000mah and lasts about 6 hours at high brightness and 20 hours at low brightness.