Bring great sound on the go with this speaker and wrist strap. This wireless speaker features high definition Bluetooth® 3.0 technology. Pair your Bluetooth-enabled device from up to 30 feet away and enjoy dynamic stereo sound. It features a 350 mAh lithium ion battery and offers up to 1.5 hours of playback time. Add your custom imprint and create the perfect promo for any promotional event or occasion. Approximate size is 1 7/8"W x 1 7/8"H x 2 1/8"H.