Power- Get ready to be enthralled by the 10W RMS stereo sound on Stone 352 portable wireless speakers,IP Rating- With a speaker that offers an IPX7 marked resistance against water and splashes, you can enjoy your playlists across terrains in a carefree way. Charging Time About 1.5-2 hours,True Wireless- It supports TWS functionality, meaning you can connect two Stone 352s together and simultaneously play music on both of them for twice the impact.