The CyberPower CSB606M Surge Protector keeps your electronic equipment safe and sound. It utilizes the Metal Oxide Varistor (MOV) technology to provide protection against power surges up to 900 joules. The surge protector has a circuit breaker that automatically turns down the power if there is an overload. An EMI/RFI noise filter is also integrated into the surge protector to reduce electromagnetic and radio frequency interference. The metal housing of the protector is impact-resistant and ensures durability. Keyhole slots are provided for hanging the surge protector on a wall.