NGS Roller Flow is a speaker that you can take anywhere and without having to worry about cables thanks to the Bluetooth connection. It has a removable shoulder strap that will allow you to enjoy your music wherever you go. This device is equipped with Bluetooth 2.1 technology. for wireless transfer with Smartphones. tablets or laptops. as well as a USB port with MP3 and an SD memory slot. for playing USB devices. MP3 players and memory cards. Also. NGS Roller Flow has an FM radio frequency tuner with automatic search and station storage. Through its auxiliary input it is possible to connect wired audio devices. like smartphones. MP3. etc. Its 20 W of power. They will allow you to listen to your favorite music with extraordinary sound quality. The built-in 1800 mAh battery stands out for its long life. with an autonomy of 5 hours at maximum volume. To recharge the battery you simply need a standard MIMIUSB charger. There can be several power supply routes: through the car's USB port. a portable computer or electrical outlet. making it the perfect solution to take on any outdoor getaway. Beach. camping. mount ... etc. a portable computer or electrical outlet. making it the perfect solution to take on any outdoor getaway. Beach. camping. mount ... etc. a portable computer or electrical outlet. making it the perfect solution to take on any outdoor getaway. Beach. camping. mount ... etc.