Meanhoo Digital Waterproof wire/wireless Bike Cycle Computer for Bicycle Camping, speedometer odometer for Merida giant Schwinn Huffy Four-row window real-time display the current speed, trip distance, riding time, trip time calorie consumption, current time and date, backlit feature with high-brightness light source for a clear view of all data during your night trip. Overspeed reminder for safer cycling, real time indication of acceleration or deceleration for easy control of your speed, low battery indicator for you to know the work situation of the odometer. Wireless LCD Bike Bicycle Computer Odometer Speedometer Specifications SPD: CURRENT SPEED; "+" "-" button key. AUTO: ON/OFF; 12h/24h, kilometer/mile and Celsius/ Fahrenheit optional with calendar. Small size, light weight, easy to install and release, wide range of applications, suitable for bicycle/electric cars, motorcycles can even use. Working temperature: -10~60 degree centigrade. Voltage: DC3V. Material: ABS. weight: 29g / 1oz. size: Approx. 5.5 * 4.5 * 1.8cm / 2.2 * 1.8 * 0.7in.