ITEM NAME:4 Digit 0.4inch Blue LED Digital Electronic Clock for Car Motorcycle Motor Product Description Description: 100% Brand new and high quality Power Supply Voltage: 4.5~30Vï ¼Ë†wide range) Backup Battery:ï ¼â€˜x CR1220(included) Working current:ï ¼Å“20mA Time accuracy: ≠¤2 seconds/day Display Color: Blue Dimensions: Approx.41mm x 23.5mm x 18mm Display:4 digits 0.4" LED, 24 Hours display Dimensions: 48×29×21 mm Mounting-hole size: 45.5×26.5 mm Minimum power supply voltage: 4.5V Maximum power supply voltage: 30V Working temperature:-10℃ï ½Å¾+65℃ Working Humidityï ¼Å¡10ï ½Å¾80%ï ¼Ë†no condensation) Sunniness: No direct irradiation Wire length:15cm Included: 1x Digital Electronic Clock 1x CR1220 Battery.Included: 1x Digital Electronic Clock. Display:4 digits 0.4" LED, 24 Hours display. Display Color: Blue. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.