If you want to have synchronized music from wireless speakers in multiple rooms in your house, there are quite a few solutions available on the market today but none of them are particularly cheap. Expect to pay about $400 per room for a really good solution that sounds good and easy to set up like the popular Sonos speakers. If you are not willing to spend that much on a solution, the Bem Wireless Speaker Trio Multi-room Speakers is definitely worth considering.
Let it be clear that the Bem Wireless Speaker Trio is not a cheap solution but you are getting a high quality product at a very reasonable price. The system comes with a base station that also acts as a charging station for the 3 portable speakers. Once charged, you can move the portable speakers to any spot within your house as long as it less than 100 feet from the base. Of course walls, floors and other pieces of furniture may reduce this range. However, with a strategically placed base station, you should be able to cover an entire home unless you happen to live in a mansion.
The Bem Wireless Speaker Trio connects to the music source via Bluetooth or the audio in port. If you are using Bluetooth, the source needs to be within 30 feet from the base. One way to have complete control over your music playback from a longer range is to connect a WiFi enabled player to the base and then control the source using WiFi with your smart phone or tablet.