You don't need to be an audio engineer to get the best sound for your room. These wireless rear speakers use 360 Spatial Sound Mapping to cleverly measure the distance of the room and create phantom speakers. You'll hear every footstep and gust of wind with incredible intensity. Combined with the up-firing speakers and wide-directional woofer, it'll feel like the action is happening in the room. There are no cables to contend with either - these speakers truly are wireless thanks to built-in batteries. You'll get up to 10 hours of playtime, but don't worry if you've already popped your popcorn and they're running low - a 10-minute charge will give you another 90 minutes.Good to know- If you want to move a speaker, you can re-map your space anytime by pressing the Optimise button- Place the speakers on tables, stands or mount them on a wall- The speakers pair wirelessly with Sony A-Series sound bars - and are designed to match the look too