Usage Tips:Features: 2 pack or more electronic saving boxes can be used in a family with many electric appliances and loading carry,providing stable voltage and balance the current, prevent voltage instability. Just plug the electricity energy saver into a power socket and the green indicator light will be bright, then starts to work by keeping the device connected; it will reduce your power consumption . The power saver device will release the electricity which it stored by using a system of capacitors in a smoother way to normal without the spikes when it works under the rated load. The external for shell adopts advanced fire-proof and explosion-proof material, and internal leakage for protection measures make it safe and reliable. The power factor saver can prevent electrical overheating when it operates normally with the rated load; this is truly a great advantage. Specifications: Material: ABS(antiflaming) Size: 11.5x6.5x4cm/4.5x2.6x1.6in Quantity: 2 pcs Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2X Power Saver