JBL's PartyBoost is why I'll never buy another Bluetooth speaker - Android Authority
Amazon.com: JBL Flip 6 - Portable Bluetooth Speaker, powerful sound and deep bass, IPX7 waterproof, 12 hours of playtime, JBL PartyBoost for multiple speaker pairing for home, outdoor and travel (Blue) : Electronics
JBL Xtreme 3 PartyBoost Button Explained - Tom's Tek Stop
JBL's PartyBoost is why I'll never buy another Bluetooth speaker - Android Authority
Amazon.com: JBL Flip 6 - Portable Bluetooth Speaker, Powerful Sound and deep bass, IPX7 Waterproof, PartyBoost for Multiple Speaker Pairing, Home, Outdoor Travel (Squad) (Renewed) Camouflage : Electronics
Amazon.com: JBL Boombox 2 - Bluetooth Speaker, Powerful Sound Bass, IPX7 Waterproof, 24 Hours Playtime, Powerbank, PartyBoost for Speaker Pairing, for Home and Outdoor, and Megen Pertection Bag (Camo) : Electronics