Tamper-Resistant Extra Heavy-Duty Surge ProtectiveDuplexReceptacle offers increased transient protection, reliability and protection notification (Audible Alarm with LED Indicator). Back & Side Wire, 20amp 125volt, White.FEATURES:- Dual mechanical shutter system to help prevent insertions of foreign objects.- Two drive screws anchor strap to back body and face where abrupt removal torque is greatest.- .032 inch thick brass triple-wipe power contacts for lasting retention.- Corrosion-resistant plated steel strap is locked in to the face and back body to resist pulling away from the face/body assembly.- Auto-ground clip assures positive ground.- Easily accessed break-off line-contact connecting tab for fast and easy split-circuitwiring.- Backed-out tri-drive steel terminal screws. Side wire capability.