This circuit maintenance protection socket is specially designed for DIY enthusiasts, maintenance technicians, and households that frequently test or repair electrical appliances. It integrates multiple safety and testing functions in one unit, allowing you to connect and test various household appliances quickly and securely. this socket can be used to normal working conditions of an appliance while monitoring its power status. It is suitable for testing the on/off function of appliance switches, checking short circuit conditions, and verifying whether a power supply output is stable. The design focuses on user safety. The test socket provides reliable insulation and secure contact points to reduce the risk of accidental shock during operation. Clear input and output interfaces easy to distinguish connection directions, helping you avoid wiring errors. Compact and easy to carry, the socket is convenient for field service and indoor maintenance. Whether you are checking for a possible short circuit, verifying the integrity of a switch, or confirming that a power supply is delivering current correctly, this maintenance protection socket provides a straightforward and efficient solution. Use it as a reliable assistant for your electrical testing work to improve troubleshooting speed, reduce misjudgment, and enhance the safety of your household appliance maintenance tasks. 1. Maintenance Protection: With the circuit breaker handle in the maintenance protection side (circuit breaker open), the light bulb is inserted into the circuit for short-circuit detection during maintenance. 2. Equipment Monitoring: With the circuit breaker handle in the normal pass-through side (circuit breaker closed), this is used to view parameters such as voltage, current, power, power factor, and power consumption of the electrical appliance (load). The instrument has overload and overvoltage alarms. Precautions: 1. For induction cookers, the anti-interference connecting the live and neutral wires must be disconnected before testing. 2. Maintenance protection is to low-resistance loads such as heating wires or motors. Color: As Shown Material: plastic Package Contents: 1*Circuit maintenance socket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.