Automotive Electronic Clock DIY Creative LED Digital Vehicle Clock Waterproof Luminous Clock Specification: Supply Voltage DC 4.5~30 V Standby Battery CR1220 (can be maintained more than 12months without power ) Working Current 20m A Power supply, key lead length 120mm Display Mode 0.4 LEDSize 54 * 30 * 27mm Package Included:1 X LED Digital Vehicle Clock