Features: 1, Automatically light when electric cutted off. 2, LED signal bulbs indicate the conditions of testing, charging. 3, Automatically charged and leaked. 4, Single side. Technical Specifications: Working Voltage: AC220V?0% Frequency: 50Hz Emergency Time: ≥90 min Charge Time: About 20 hours for the first use. Fixing: hoisting, hanging Applied for: hotel, mansion, market place, office, factory,restaurant and recreation place etc. More information, welcome to our website .cn