JBL Battery 400 in-ear headphones and earbuds Frequency response: 70 Hz -

Frequency response: 70 Hz - 20k Hz (-6dB)

Packaging Dimensions

No extra wires

258 x 128 x 119mm/10

Vintage Charm

JBL Battery 400 in-ear headphones and earbuds Frequency response: 70 Hz -Add to Cart General Features Whats in the box Key Specifications Reviews General Features A great host always has a spare battery Keep the party going twice as long by having a spare JBL Battery 400 on hand. Just insert it into the battery slot in the back of your JBL PartyBox Stage 320 when the first one loses its charge. Each battery has enough power for up to 18 hours of playtime, which means you could keep the party going for up to 36 hours.