Strong Inner Bass Design With anti-clipping and high-fidelity magnetically shielded full range speaker unit plus vibrating diaphragm, high power waterproof speakers provide high quality and clarity sound at different volumes Variety of Accessories Design Removable Green Strap + Climbing Hook Loop design for Outdoor Travel Built-in microphone for hands-free phone calls With its built-in microphone, the wireless Bluetooth speaker works as a speaker phone. When a call comes in, the music is put on pause and you can talk via the speaker Built-in rechargeable battery for music playback anywhere The built-in 800 mAh rechargeable battery lets you enjoy your personal music without the fuss of entangled power cords and the inconvenient search for an electrical outlet Fashion Rock Solid Design Comfortable feeling with soft rubber covering. Durable aluminum speaker mesh lasts long. The well-structured rock solid design can prevent considerable damage and ensure non-stop music playing Best choice for outdoors It is portable. and water-proof. A rubber loop on one side for portable outdoor hooks, perfect for backpacks. A one-click LED flashlight on the other side, works perfectly in darkness, especially for emergency Specification: Bluetooth connection Input voltage: DC5V/0.5-2.1A Output power: 5W*2 6W*1 RMS Polymer battery: 7.4V/800mAh Speaker unit: 4 /5W Frequency response: 80Hz~22kHz SNR (signal to noise ratio): 80DB Working time: Approx. 4-8 hours Receiving frequency range: 10m Protection rating: IP44 Item size: 240 X 60 X 38mm Item weight: 245g Package Includes 1 x Wireless Speaker 1 x Mini USB Charging Cable 1 x AUX-in Cable 1 x Carabiner Clip 1 x Green Strap 1 x Manual