Features:_x000D_ 1. The electronic clock is waterproof and dustproof design, very durable in using._x000D_ 2. It adopts one-button operation, which is practical and easy to use._x000D_ 3. By default, the hour, minute, second, date, and timer can be displayed, or the timer function can be turned off according to your needs._x000D_ 4. It adopts 24-hour display mode and has power-off memory function._x000D_ 5. It adopts DC4.5-30V wide supply voltage with reverse connection protection._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Material: ABS_x000D_ Optional Color: Red, Blue, Green_x000D_ Supply Voltage: 4.5-30V (wide range)_x000D_ Backup Battery: CR1220 (clock backup power supply, the time can be maintained for more than 12 months without power)_x000D_ Working Current: 120mm_x000D_ Size: Approx. 54 x 30 x 27mm / 2.13 x 1.18 x 1.06in_x000D_ Mounting Hole: Approx. 47.2 x 27.3mm / 1.86 x 1.07in_x000D_ Minimum Supply Voltage: +4.5V_x000D_ Maximum Supply Voltage: +30V_x000D_ Working Temperature: -10 - +65_x000D_ Working Humidity: 10-80% (no condensation)_x000D_ Working Pressure: 80 - 106kPa_x000D_ Sunlight: No Direct Sunlight_x000D_ _x000D_ Package List:_x000D_ 1 x Electronic Clock_x000D_ _x000D_ Instructions:_x000D_ 1. Power on:_x000D_ When the red positive and black negative connections are connected to the power supply, the time will be displayed._x000D_ The built-in CR1220-3V backup twists button battery, when the external power supply is not connected to the power supply, the clock will go all the way and will not stop._x000D_ 2. Key switching sequence: time division mode - second mode - date mode - timer mode_x000D_ 3. Second mode:_x000D_ In time mode, press the button to display the second, the display format: XX_x000D_ After no button press for about 30 seconds, it will automatically jump back to the hour and minute mode. _x000D_ Press again to jump to the next mode_x000D_ 4. Date mode:_x000D_ In time mode, press the button twice to display the date, display the date format: month._x000D_ After about 30 seconds, it will automatically jump back to the hour and minute mode._x000D_ Press again to jump to the next mode_x000D_ 5. Timer mode:_x000D_ In time mode, press the button three times to display the timekeeping mode, display format: 00:.00_x000D_ If there is no start timing, no button press within 30 seconds will automatically retreat to the hour and minute mode._x000D_ In the timekeeping mode, press and hold the button to start timing. The point below the colon starts to flash; then press and hold the button to pause the time. The point below the colon is always on, not flashing;_x000D_ Timing clear method: external red, black line power off, long press the button for about 5 seconds_x000D_ In the timekeeping mode, press the button to switch to the hour and minute mode, and also to view the date and seconds._x000D_ 6. Time setting:_x000D_ In hour, minute mode or second mode, press and hold the button until the hour number flashes, indicating that the time is set, and press the button again to adjust the hour._x000D_ After the hour is adjusted, press and hold the button until the minute number flashes, indicating that the minute setting is entered. Press 1The electronic clock is waterproof and dustproof design, very durable in using. 2It adopts one-button operation, which is practical and easy to use. 3By default, the hour, minute, second, date, and timer can be displayed, or the timer function can be turned off according to your needs. 4It adopts 24-hour display mode and has power-off memory function. 5It adopts DC4.5-30V wide supply voltage with reverse connection protection.