Customized Headphones, Earbuds & Speakers, Stark 2.0 Bluetooth Speaker - Waterproof & 4.5hr Battery, The Stark 2.0 Bluetooth Speaker packs quality sound into a compact size. The battery lasts up to four and a half hours at max volume, and it can be fully charged in three hours. With an IPX5 Waterproof rating the Stark 2 can be used inside or out. The built-in microphone and music controls lets you make or receive calls while controlling the audio. The Bluetooth working range is 10 meters (33 feet). Includes Type-C charging cable. Three-watt speaker output. Giftbox and manual are made from FSC-certified material. ... #7197-40 $16.58/each.