The bluetooth speaker is made of metal material. Internal rechargeable battery can be connected by Bluetooth or 3.5 audio cable. It's easy to connect your device with bluetooth 3.0 technology. Specification -- Bluetooth version: 3.0+EDR, Output power:3w, Working range: 10m, Built-in battery: 500mah, Frequency response: 280HZ-16KHZ, Signal&noise ratio: 95dB.
