Powerful Stereo Sound Dual drivers and passive radiators deliver crystal clear sound. BassUp Technology Our exclusive technology uses an in-house tuned digital signal processor to analyze and intesify bass in real-time. Link 100+ Speakers Wirelessly link more than 100 speakers for synchronized music and lights using our PartyCast technology. 20-Hour Playtime Enjoy up to 20 hours of continuous playtime from a single charge. IPX7 Waterproof The fully waterproof casing keeps Select 2's internal components safe from liquids to keep the music playing! Bluetooth: YesWeather Resistance: IPX7True Wireless Stereo: Yes