The Cooper Wiring Devices TWRVGF15W 15-Amp 125-Volt Tamper & Weather Resistant Ground Fault Circuit Interrupter (GFCI) Duplex is tested to the highest standard to help ensure safety, and will deny power and prevent resetting if the device is no longer able to prevent safe, protected power. Its unbreakable nylon construction provides unsurpassed chemical and impact resistance. This device features a large visual indicator light that-Feets gives a quick notification of a tripped or "end of life" condition. The longer and wider bridge strap provides 40-percent more contact area with the wallboard, virtually eliminating floating installations. The test and reset buttons are colored match to provide superior aesthetics. For easier installation, it comes with tri-combo head and terminal screws and its ground termination with back-wire clamps provide secure wiring. The Cooper Wiring Devices TWRVGF15W 15-Amp 125-Volt Tamper & Weather Resistant Ground Fault Circuit Interrupter (GFCI) Duplex meets and exceeds 10ka Short Circuit Testing and UL943 Safety Standards. Cooper Wiring Devices is committed to providing products that increase productivity, energy efficiency, safety at work and in the home, and produce reliable performance. Whether a home-Feets style is traditional, modern, casual, cozy or rustic, it will demand more from wiring devices than in years past. Cooper Wiring Devices is dedicated to providing the up-to-date wiring device solutions that today-Feets homes need.