JBL Battery 400 Spare Battery - Compatible with The JBL PartyBox Stage 320 and Xtreme 4 Portable Speaker (Speaker Sold Separately) Q1 Polk Audio OWM3 Wall and

Polk Audio OWM3 Wall and Bookshelf Speakers (4 Speaker Bundle)

Can be mounted vertically or horizontally

MFR # DCR52-BK

Yamaha Proprietary Sound Processing

JBL Battery 400 Spare Battery - Compatible with The JBL PartyBox Stage 320 and Xtreme 4 Portable Speaker (Speaker Sold Separately) Q1 Polk Audio OWM3 Wall andPrice Match Guarantee JBL Battery 400 Spare Battery Compatible with The JBL PartyBox Stage 320 and Xtreme 4 Portable Speaker (Speaker Sold Separately) The JBL Battery 400 is an external battery designed to extend the playtime of compatible JBL speakers. Here's a breakdown of its key features: Double the Playtime: Each battery provides up to 18 hours of additional playtime for your speaker, effectively doubling the total playtime on a single charge.