Description Material: ABSSize: 4.6*4.6*1.8cmColour: Black Display: liquid crystal displayBacklight: Green/WhiteFeatures: Wireless automatic wake-upPower supply: 1 CR2032 button battery in the meter head; 1 12V 23A transmitter battery 1. The automatic wake-up function automatically wakes up from sleep mode when it senses bicycle vibration. The bright LCD display makes it easy to view ride stats. 2. Multifunctional Small size, light weight, wireless, waterproof design make it convenient and durable. This cycling computer measures speed, distance and ride time. Just the stat tracking info any serious cyclist or fitness fanatic needs to know. 3.Day & Night Backlight provides backlight for easy viewing during dark hours. Press any button between 18:00 and 06:00, the backlight will automatically turn on. Please note that a slight rattling noise is normal and is caused by the wireless auto feature by design. 4. Easy to install and use Simple installation only takes a few minutes. Easy-to-navigate interface with just two buttons to access all measurements. Customizable to most common tire sizes for accurate stat tracking. 5. Suitable for road bikes, mountain bikes, folding bikes and other common bikes Compatible with this bike computer. This bike computer may not be compatible with some pedelecs. If the computer monitor, sensors and magnets can be mounted within the specified distance, the device should be fully compatible Package Included: 1 * Measurer Note: 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding. 2. Colors may vary due to different monitors, please understand. Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/mailbox without name, etc. is incorrect, the order will not be delivered correctly.)