Features:- Material: Natural Bamboo- Stylish, Hip and Modern- A great gift for anyone who loves MUSIC- After carbonization, the outer surface of furniture paint-No battery, no power supply-Can be used both indoor and outdoors 1:Echo resonance principle using voice, deep and powerful sound wood materials guaranteed.2: Phone in the card slot, either better let you enjoy the joy of music to be more convenient to let you watch the video.3:The natural wooden handmade sound amplifier enables you to share your music through passive sound amplification. Incredibly durable and renewable wooden and bamboo bring a relaxed style to any area. Our passive amplifier is hand-made to create a unique and one of a kind look.Color please refer to pictureSize: long 100mm/3.97'' width 60mm/2.36'' high 3mm/1.18(about)Can be used for mobile phones with thickness less than 12 mm and width less than 85mm,fit for smart phone less than 6.4inch. Package Includes:1 x Phone Sound Amplifier(Does not include mobile phones) Note:1.Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid.2.The colors may have different as the difference display, please understand.Products from JINYI's store