4.4 in. width X 6.1 in. height X 3 in. depth sizing lets you tuck this portable speaker into any nook or cranny. 20W RMS audio power is ideal for gatherings of up to 10 people. Bluetooth with NFC connectivity lets you connect to devices up to 30 feet away, for convenience. Built-in rechargeable battery provides up to 15 hours of continuous playback. Dust proof and splash proof, so you can rest easy knowing your speaker is safe. Built-in speakerphone lets you take calls from your phone.