Knog PWR Sound is a Bluetooth speaker that is part of the comprehensive PWR collection. This offers interesting products for cycling and outdoor, and uses PWR power banks as power sources. The kit includes a small 3350 mAh powerbank to keep the fun going for longer. The speaker can be mounted to bike frames and other tubes using the PWR Frame mount, which can be purchased. Two built-in 40 mm speakersRange 25 metersDimensions: 97 x 48 x 129 mmWaterproofCompatible with small and medium PWR powerbanks Powerbank 50% volume 100% volume 3350 mAh 30 hrs. 10 hrs 5000mAh 40 hrs 14 hrs