GThis very nice HOMTSsAW Bluetooth Speaker has solar charging technology and if it is charged for 10 minutes byn the sun it can play for 30 minutes. It can play for 30 hours on a regular charge. Thed bluetooth speaker is water resistant and shockproof. It has very good clear stereo sound. There is a 100% guarantee. There is a power button on the side of the speaker and 2 buttons to advance and reverse musical tracks and they are also volume buttons to make the speaker louder and softer. The buttons are small and you will have to learn where they are on the speaker but this is a very good Bluetooth Speaker. #RankBoosterReview ii, Sponsored iii HOMTSSAW Bluetooth Speaker https://www.amazon.com/gp/product/B073VMVK4C/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1