Qi Wireless Charger Pad for Qi-enabled Devices (Dual Pad (Bamboo)) Charging efficiency: &gt;73% Wireless distance: 5-10mm Fully compatible with Qi-enable devices or devices with Qi receiver. Plug and play Qi standard,easy to use,simply drop phone to start charging. Hides your micro-USB socket & plug making the Qi technology inside even more discreet.