JBL Flip 4 Bluetooth Speaker | White In good used condition, some discoloration due to age. No battery issues, great sound quality. Charger cord included. JBL Flip 4 is the next generation in the award-winning Flip series; it is a portable Bluetooth speaker that delivers surprisingly powerful stereo sound. This compact speaker is powered by a 3000mAh rechargeable Li-ion battery that offers 12 hours of continuous, high-quality audio playtime. Sporting durable, waterproof fabric materials that are available in 6 vibrant colors, Flip 4 is the all purpose, all weather companion that takes the party everywhere.