Size: 1 inch tall and 1 inch round.The rechargeable battery gives you continuous play for 4 hours. It also has a built-in mic so it can answer your calls handsfree, and comes with a lanyard to take it with you anywhere you go. It connects to your Smartphone and Tablets as well as any Bluetooth enabled devices. They come in solid and metallic looks and are great for any setting and decor at home and office, near the pool and at a picnic spot. Get more to enhance the sound for the party time and for gift giving, each sold separately.