Designed For The Healthcare Market and Capable Of Withstanding Heavy Use Due to Its Ul Hospital Grade Certification. Features Include An Improved Overall 3.1A Usb Charging Capability, Auto-Ground Clips, Zinc-Plated Ground Terminal Screw, As Well As Triple-Wipe Brass Contacts For Lasting Retention. The Screw-Pressure-Plate Back Wiring Makes Installation Fast and Easy. Also Available In Black, Green, Gray, Ivory, Light Almond, Nickel, Red and White. For Detailed Tamper-Resistant Receptacle Information, Visit