PUMA PMAD6050-BLK Soundchuck durable, shock and weather resistant silicone exterior. Silicone chord to hang Soundchuck on almost anything. Lightweight, sleek design weighs less than a pund. Bluetooth enabled for wireless pairing: built-in microphone allows hands free calls. Powerful magnet holds the two speakers together, and voice prompt activated. Built in rechargeable battery offers more than six hours of play. Crystal clear Hi-Fi acoustics.