The is the original Bose S1 Pro (released in 2018) is a portable, multi-position Bluetooth PA system featuring a 3-channel mixer, ToneMatch processing, and Auto EQ, weighing about 15 lbs with an optional rechargeable battery that provides up to 11 hours of playback. Please note - even those the box label says "no battery," be advised that it does have the battery, I purchased the battery and installed it later after the purchase of this unit. Anyways, it's in good working order with no issues, it has a few scuffs and scratches but these units are build to take it.

Key Features of the Pre-2023 Original S1 Pro

3-Channel Mixer: Includes independent volume, treble, and bass controls, plus built-in reverb on channels 1 and 2.

ToneMatch Processing: Offers preset optimization for microphones and acoustic guitars.Auto EQ: Automatically adjusts the speaker's tonal balance depending on its physical orientation (floor, table, tilted back, or stand-mounted).

Portability: Built with a rugged enclosure and a top-mounted carrying handle. Ability to operate off AC or the rechargeable battery.

App Control: Compatible with the older Bose Connect app (supporting features like Party Mode for pairing a second speaker).