Check the listing for details. Bose S1 Pro+ Wireless PA System With Backpack. Condition: New. Listed at 859.00 USD. S1 Pro+ Wireless PA SystemThe next time you perform, bring the versatile, portable, powerful Bose S1 Pro+ wireless PA system. It lets you add any vibe anywhere you play, with a wireless design that’s more lightweight and powerful than the original. Connect your equipment with an integrated 3-channel mixer and access controls like independent EQ, reverb and ToneMatch presets with intuitive OLED displays. Or, get it all on your phone through the Bose Music app. A rechargeable lithium-ion battery provides up to 11 hours of play time per charge, while the system itself weighs just 14.4 lb. Place it vertically, tilted back, horizontally or on a speaker stand (it’s compatible with standard 35 mm mounts). Auto EQ senses the orientation and adjusts the speaker’s performance.