STACK 4 AC Outlet Surge Protector Detachable & Interchangeable 4 AC Outlet Power Strip Stack 4 US AC Outlet Surge Protector comes with 4 US AC outlets, built-in power switch, surge protection and over current circuit breaker offer extraordinary protection to the connected equipment 4 Power Outlet Base - interchangeable model allows you to click in individual sockets as needed including AC Extension Sockets, USB Chargers, TV Antenna, Satellite Dish, Telephone, LAN Surge Protector Technical Specifications: AC Cable Length  1 meter / 3.28 feet; Input Power  110Vac 60Hz; Output Socket  4 x US Socket; ON / OFF Switch  YES; Circuit Breaker Protection  15A; Max Surging Voltage  395V; Max Surging Joules  252J; MOV - 14D241K / 3pc (L-N, N-G, G-L); Dimensions  305 x 61 x 36 mm / 14.41 x 2.40 x 1.42 In.; Weight  564 g / 19.89 oz Compatible with Stack 3 Outlet Extension Module, Stack Dual USB Charging Module, Stack rJ11 & RJ45 Surge Protection Module