1SHORT CIRCUIT DETECTION HOME APPLIANCE MAINTENANCE: The voltmeter can measure the line on and off short circuit, the application of this principle can measure the quality of the motor coil, whether there is a electrical leakage, 0~200M large range can meet most of the maintenance needs 2ADJUSTABLE 90 EXTENSION SUPPORT FRAME: The digital multimeter has an extendable support frame on the back that can be adjusted according to actual viewing for easy standing operation 3PREVENT DROP SILICONE CASE: The digital multimeter support groove fitting, and the effective prevent drop silicone material protect the hardware from damage 4SAFE AND DURABLE PEN: Digital multimeter tester can prevent arc creepage, possess high accuracy, stainless steel meter pin is sturdy, durable, plug and measurable 5AUTOMATIC SHUTDOWN, 9V BATTERY LONG LIFE: Low power mode multimeter, boot within ten minutes of not used automatically shut down, save more worry