Ultimate Ears ROLL 2 Bluetooth Speaker Ultraportable with Floatie, Waterproof and Shockproof - Giraffic Park

UE ROLL consists of a 51-millimetre (2 in) driver coupled with two 19-millimetre (3⁄4 in) tweeters which are in stereo, so there is a small amount of stereo separation. In terms of sound output, it supports a maximum of 85 dBA in a range of 108 Hz–20 kHz.