Powerful - Samba speaker + 10-watt wireless charger + 4000 mAh portable battery

Strong - Coaster Speaker Whether you are in your office or the gym or enjoying outdoors under the warm sun, the Coaster speaker is designed for up to 4 hours of amazing sound, regardless of environment, you can enjoy your music. Suitable for most tablets and smartphones and allows your favorite devices and also you can combine 10 speakers at the same time. Features: compatible with powerful portable you can operate 10 *Coaster Speakers* at the same time playback duration: 4 hours standby time: 10 hours capacity: 1200 mAh / 3.7 V frequency: 2100dB rated power (AES): 3 watts input: 5W (MAX)