Product Name: Three-in-One Voltage Clock

Product size: 7.8*11.5*1.5CM

Weight per unit: 120g

Packing Size: 46*37*37CM/100PCS

Material: New ABS

Applicable vehicle models: All 12V series vehicles

Features: Temperature-compensated voltage-regulated clock

Compact design with a large LCD display makes numbers easier to see;

Time, voltage (9V-30V), temperature (-20-70°C)

It can be set to display separately the time, voltage, temperature, or to cycle through these three modes, and the mode will automatically save after the car is turned off.

Built-in rechargeable capacitor (not a battery). Eliminates the hassle of replacing button batteries, the car battery can maintain for a month after the engine is turned off, and it takes only 1 minute to recharge the battery again;

The significance of the product voltage value: When the car is powered on but not started, it is the battery voltage, which should be within the normal range of 12.2-12.8V. If it drops below 11.6V, it's important to pay attention and immediately turn off the vehicle's electrical equipment and start the engine to charge the battery. Connect a professional battery testing instrument to measure the battery capacity. If the value drops below 10V, it might not be able to start the engine.
After the car is started, the voltage from the generator should be within the normal range of 13.4-14.8 volts. If the voltage drops below 13.4 volts, the car's battery will not be charged. Check the belt of the generator and any abnormal load on the vehicle's electrical equipment. If the voltage exceeds 14.8 volts, it indicates that the generator is producing too much electricity, which can damage the battery and the vehicle's electrical systems. Check the generator's stabilizer.