Ivation Boomer Portable Rechargeable Bluetooth Stereo Speakers with 2 Bike Mount Options, Black Booming Stereo Sound w/2.1 Speaker Arrangement Latest in Bluetooth Connectivity for Crystal-Clear Streaming Built-In 1200mAh Rechargeable Lithium Polymer Battery Integrated Soft-Click Music & Phone Controls Dual Mounts Included: 1 Hard Plastic, 1 Silicone Strap