The Professional Surge Protector CSP300WU safeguards common home and office devices, such as computers and electronics, by absorbing spikes in energy caused by storms and electrical power surges. Designed for convenience, the portable CSP300WU is ideal for travelers, provides 918 joules of protection, has three surge-protected outlets, and a folding wall tap plug. Two USB (2.1 Amp shared) ports charge personal electronics, including smartphones, digital cameras, MP3 players, and other devices. The CSP300WU also features metal oxide varistor (MOV) technology, an EMI/RFI noise filter, a status indicator, and impact-resistant casing. This surge suppressor comes with a Limited Lifetime Warranty and a Connected Equipment Guarantee.