Description The bike speedometer is a cycling equipment accessory. When it is installed, it will make you safer and more secure during riding. You can control your riding at all times and let you have a better riding. A perfect gift for your bike lover friend. Features -Color: Black, Red -Material: ABS -Size: 4.50X4.50X2.00cm/1.77X1.77X0.79in -Note: Powered by button battery(Included) - Suitable for bikes and electric bike, it is also convenient to carry with your side. - Waterproof design, thus you can use it confidently even in a rainy day, and it will not be damaged by the rain. - Perfect for leisure cycling, competitive competition and more, measuring their time. - Secure and convenient speedometer for easy installation, bringing much convenience for you. - Manufactured with premium material that can be used for a long term use. Suitable for bikes and electric bike, it is also convenient to carry with your side. Waterproof design, thus you can use it confidently even in a rainy day, and it will not be damaged by the rain. Perfect for leisure cycling, competitive competition and more, measuring their time. Secure and convenient speedometer for easy installation, bringing much convenience for you. Manufactured with premium material that can be used for a long term use.