Bike Light Set Bicycle Headlight with Horn and Speedometer Odometer USB Rechargeable Bike Front Light and Tail Light Night Riding Bicycle Light Speedometer Multi - Function with LCD Display Bicycle Odometer USB Rechargeable Code Table Bike Light Cycling Headlight with Loud Electric Bike Alarm Bell horn Product features: Head Sensing Code Table Bicycle Light Intelligent Battery Display 120 Hight Decibel Horn Large-screen display, anti-glare design, battery power display, can be connected to a Wired code table, observe the speed Product specifications: Size: 14x10x4cm Weight: 100 grams Material: ABS Color:Black /Red/ Blue Charging Time: 2-3hours Discharge Time: 5-8 hours How to Set Step 1: Set the unit --- Long press the Set Button "- and the Mode Button "+", the words "km/h", press the Set Button "-" to change it as m/h or not. Step 2: Set the speed --- Press the Mode Button"+", at the same time, the number "208" will blink on the display, it means the default wheel size, the unit is CM. You could press the set button"-" to change the wheel size from 10-315 CM. Step 3: Set the ODO --- Press the Mode Button"+", press the set button"-" to adjust ODO. Step 4: Press the Mode Button"+". Done. CodeTable usage instructions are as follows: ODO: the total number of kilometers DST: one-way kilometers MAS: top speed AVS: average speed T M: Cycling time Package Contents: 1* LED Bicycle LightsWith LCD display and holder) 1 * Bike tail light 2* USB Charging Cable 1* Speaker Controller 1* Code Table Data Receiver 1* Code Table Data Sensor 1* Instruction Manual 2* Foam Gasket 4* Fixing Strap _x000D_