It can be connected to various brands of mobile phones, IPAD tablets, car Bluetooth, and other Bluetooth devices. The 4.2 version has fast signal transmission and a stable and clear distance of 10 meters. It solves the trouble caused by the usual long and short wires! Wireless, put it wherever you want. Use Bluetooth to connect the mobile phone, the speaker has a microphone, it can be used easily, zero radiation, good for the body.