Its the HotShot™ the most compact of Monsters SuperStar™ SPSTRHOTBTBKG line of portable wireless speakers. While small enough to clip to a backpack, jacket, or belt loop, the HotShot™ packs a sizeable punch with portable Pure Monster Sound®. You and your friends can take the music anywhere: the park, beach, hiking, cycling, or just chilling or grilling. Virtually no limits. It's rugged, tough, and very easy to use with NFC Tap 2 Pair feature super portable, with carabineer clip included, and long 5.5 hour play life. And HotShot™ is also a great speakerphone!