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 times Installation:35mm DIN rail Colour: white Material: ABS + electronic component Size: 9.0 cm x 4.0 cm x 5.0 cm Package Contents: 1 x Voltage protector SVP-916-40A 1 x Manual instructions in English Noted: 1.Press "SET" for 3 seconds, please press continuously "SET" to adjust the required parameter value as follows, or to adjust the setting value . When "END" appears, press "SET" again, the data will be saved and valid. 2. Voltage indicator: The voltage indicator flashes quickly in case of over-voltage, slowly in case of under-voltage, and it is constantly on in case of normal voltage. 3.Current indicator: The current indicator flashes in case of over-current, and it is constantly on when current is normal. 4.After pressing "Set", if there is no operation within 10 seconds, the device status will be automatically exited, and the changed parameters will not be saved. 6.Press " and " together for 3 seconds, and the LED will be off for 1 second, indicating that the default parameter value of restoring factory settings is completed. Only the above package content, other products are not included. Note: Light 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.