The Wooden Phone Speaker is made of bamboo. The Wooden Phone Speaker has perfect size compatible with all kinds of smart phone. Design with Smooth finish,lightweight and portable, fine and tough texture, environmentally friendly and durable, perfectly holds your smart phones. A great gift for anyone who loves music. Logo can be imprinted by silkscreen, digital and laser engraved. 3.9" x 3.1" x 4.3"