Functions: 1. Over-voltage protection 2. Under-voltage protection 3. Over-current protection 4. Automatic recovery 5. Voltage display (voltage measurement) 6. Current display (current measurement) Parameters: Model number: SVP916-40A Power supply: 110V Overvoltage value: 130-150V-OFF (default 140V) Overvoltage recovery value: 131-149V (default 135V) Undervoltage value: OFF-80-100V (default 90V) Undervoltage recovery value: 81-99V (default 95V) Normal working voltage: 100–130VAC 50/60Hz Electric machinery life: 100,000 operations Installation: 35mm DIN rail Color: White Material: ABS + electronic components Size: 9.0 cm x 4.0 cm x 5.0 cm Package Contents: 1 x Voltage protector SVP-916-40A 1 x English manual Notes: 1. Press "SET" for 3 seconds, then continuously press "SET" to adjust the required parameter value. When "END" appears, press "SET" again to save and confirm the settings. 2. Voltage indicator: Flashes rapidly during over-voltage, slowly during under-voltage, and remains steady under normal voltage. 3. Current indicator: Flashes during over-current, remains steady under normal current. 4. After pressing "SET", if no action is taken within 10 seconds, the device will exit automatically and any unsaved changes will be discarded. 5. Press "SET" and another button together for 3 seconds until the LED turns off for 1 second, indicating factory settings have been restored. The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations between the product color in images and the actual item. Measurement error allowance is +/- 1–3 cm.