House of Marley EM-JA009-MI Wireless Bluetooth Speaker Chant BT Sport (Midnight) Fits in most cup holders or water bottle cages and includes a carabineer clip for portability and great sound anywhere you go. Built in microphone allows for use as speakerphone, includes an aux input for use with hundreds of devices IPX7 Liquid ingress protection makes it water resistant. With blended bio-plastic and recyclable aluminum housings it is designed to float Contains a rechargeable lithium battery for up to 8 hours of wireless play and comes with a USB charging cable. Bluetooth 4.0, A2DP mono audio and includes 2 x 4.5W -1.75 Drivers + 2 x passive radiator providing impressive sound