Seller notes

Real-time display of battery health, temperature, power and voltage. Automatic test of craking and charging system. Built-in alarm function. An alarm tone will sound due to abnormal body temperature, low battery, low voltage, startup system failure and charging system failure. The display is powered by lithium battery and solar panel, no cable, no installation required. Type-C fast charge battery can be used when the battery power is low. Adopt stable 433MHz wireless transmission technology. Bui...

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