Wooden inductive speaker is made by natural material such as bamboo, sapele wood, black walnut wood, maple wood, etc. With near-field inductive tech, the speak can work without Bluetooth, WIFI and cable, the only thing you need is to put your phone on the speaker. DC 5V USB port for charging, built-in 850mAh lithium battery can last 6-8 hours after fully charged. Customized logo can be printed or carved.