Please note, this item ships from an international seller. Expected delivery is 10-15 days. Features: The bicycle speedometer is made of high-quality wireless technology to provide stable wireless transmission and ensure the accuracy of driving data. Specification: Name: Bicycle wireless speedometer Colour: Black Size: 6 * 4.5 * 2cm Screen size: 2.1 inch Backlight: Greenlight,Package List: 1 x Bicycle Speedometer 1 x Bracket set 1 x Wireless sensor 1 x Magnetic safety sensor 1 x Rubber band 2 x Adhesive discs 4 x Fastening strap 1 x User Manual LCD digital display: The large LCD display ensures that you can easily read statistics. Practical and fast recording speed and kilometers, no time to delay. When you ride again, you can pick up this bicycle computer with a single tap and start your journey immediately. Versatile and widely applicable: It is very suitable for measuring speed, distance, riding time calorie counter, etc. This is what any serious cyclist or fitness fanatic needs. The compact size and lightweight wireless design make it suitable for most types of bicycles: road bikes, mountain bikes, folding bikes and other ordinary bicycles. This is ideal for beginners who want to take riding to a new level. Wireless waterproof design: wireless waterproof design makes it more convenient and durable. Don't worry about the complexity of installing the wires on the handlebars, the waterproof design does not need to worry about rain, but don't put it in heavy rain or stay in the water. Don't put it in heavy rain The wireless bicycle computer has an automatic wake-up function through the built-in scroll switch in the speedometer, so a slight rattling noise is normal, and this is not a product defect.