This Sony ULT FIELD 3 Bluetooth speaker delivers powerful, detailed sound. Shape your audio experience with the 7-band EQ. Activate the ULT button for an extra bass boost and increased sound pressure. Its compact design and removable shoulder strap make it easy to take anywhere, perfect for road trips or relaxing in the park. Enjoy your music all day and night with up to 24 hours of battery life. The speaker is IP67 rated, making it waterproof and dustproof for any adventure. A 10 minute quick charge provides an extra two hours of playtime. Sound Field Optimisation technology detects noise and adjusts audio for clarity. Connect two ULT FIELD 3 speakers with Stereo Pair for double the sound. Echo Cancelling technology ensures crystal clear calls.