50000 Hours Lifetime & High IlluminationBattery for back-up used in this emergency light can recharge for 300 times and work for 27000 mins at least. Every full charge can use for 90 mins emergency operation. Please note this emergency light must be wired. And the lifetime of this exit sign is 50000 hours. The head lights of this product can be rotated 180, and 360 in two position and each head equipped with 24pcs ultra bright SMD LED, can light up every corner of the darkness. High qualityThe highest quality is the promise to every customer. This emergency light is made of THERMOPLASTIC ABS HOUSING material. This will not age after prolonged use and ensures the robustness of each structure during installation and assembly. The test button used in this emergency light has undergone 1000 tests to ensure that the emergency light can automatically light up during power failure, and the test button will not fail after the power comes back. Finishing Assemble in 5 MinsThe lights are suitable for wall mount applications. Snap-fit canopy with captive mounting screws included with all lights. All Pros line-latched electronic circuitry makes installation easy and economical. INNOVATIVE, easy installation in several minutes. The fully sealed, long-life, maintenance-free lead calcium battery is ideal for emergency lighting applications. It is suitable for emergency led light fixture or emergency led lighting.Specification: Rated power: 3W Emergency time: 180min Voltage of battery packs: LIR 3.7V 2500mAh Conversion efficiency: 80% Type of lamps: LED white light Power factor: 90% Input voltage: AC90~280V Input frequency: 50-60HZ Size: 230*105*60mm The whole weight: 600g Temperature range: 10~50