The SX460 is a half-wave phase-controlled thyristor type automatic voltage regulator (AVR) and is part of the excitation system for a brushless generator. In addition to regulating the generator voltage, the AVR circuit includes underspeed and loss-of-sense protection features. Excitation power is derived directly from the generator terminals. Positive voltage buildup from residual levels is ensured by the use of efficient semiconductors in the AVR's power circuit. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generator output Color: Black Material: Plastic Package Contents: 2 x Automatic Voltage Regulator 2 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.