1Made of premium material, lightweight, waterproof, sturdy and durable for long time use. Powered by one CR2032 battery, energy-saving deisgn can offer you a long working endurance 2Large LCD dispaly supports bright backlight, can make you read readings clearly in both day and night, convenient to use 3It's multifunctional, it can show you data of speed, distance, time, current temperature, etc and also supports A/B dual independent system, which means you can record two groups of data 4The sensor is super sensitive and can work in wide range of harsh weathers and temperatures, and it has overspeed alert fucntion, which makes your cycling safer 5With necessary accessories, easy to install or disassemble, good accessory for riding loversDescription: This item is made of quality material with fine process, it's lightweight, portable, durable, waterproof, resistant to high and low temperature. The screen is luminous and clearly display the time, speed, distance, etc. This item is perfect for riding lovers. Features: Made of premium material, lightweight, waterproof, sturdy and durable for long time use. Powered by one CR2032 battery, energy-saving deisgn can offer you a long working endurance. Large LCD dispaly supports bright backlight, can make you read readings clearly in both day and night, convenient to use. It's multifunctional, it can show you data of speed, distance, time, current temperature, etc. And it also supports A/B dual independent system, which means you can record two groups of data. The sensor is super sensitive and can work in wide range of harsh weathers and temperatures, and it has overspeed alert fucntion, which makes your cycling safer. Comes with necessary accessories, easy to install or disassemble, good accessory for riding lovers. Specification:Material: Plastic Color: Black Options: Wired; Wireless Backlight: Yes Waterproof: Yes