Electricitiy-Saving Box (ESB) uses a state-of-the-art electrical technology to actively monitor and improve the power factor of your household, office or industrial appliances. In addition, the intelligent technology optimizes the voltage and current demands thus reducing the active power / KwH demands and can achieve up to 20% savings on your electricity bill! It also acts as a voltage stabilizer by storing energy for up to 10 seconds and therefore supplies the load with constant voltage during momentary power surges. This in turn results in a longer lifespan of your electrical appliances. Save money for customers every minute every second after installing. Technical parameter: - Rated Voltage: 110 - 250 VAC, 50HZ / 60 HZ - Working Temperature: -15 degrees to 60 degrees - Single phase only - This device is not designed for heavy duty load or monthly consumption higher than 500kwh. - Net weight: 125gms - Dimensions: 67mm (b) x 155mm (l) x approx 65mm (h) Function : Saving electricity 20% ; Stabized the voltage, balance the current source; Stand current waveform; Protect and Prolong the life of the electric appliances... Guide to use: Plug the electricity-saved box into any socket at home. Simple operation, no need maintenance, no need pay attention. Suitable for: houses, condominiums, apartments, shop lots, restaurants, offices, small factories, etc..