COMPACT YET POWERFUL: 40W peak / 15W RMS output from dual 2" drivers with 360 degree sound dispersion; measures 2.76" x 2.68" x 7.76", and weighs only 0.84 lbs. FLEXIBLE PLAYBACK OPTIONS: Bluetooth with EDR for quick pairing; also supports USB, SD (up to 32GB), 3.5mm aux input, and built-in FM radio. TRUE WIRELESS STEREO (TWS): Wirelessly pair two RPB25 speakers for real stereo sound with left and right channel separation. RUGGED AND WATER-RESISTANT: Durable ABS, rubber, and metal grille construction with water-resistant design, ideal for outdoor use. LONG BATTERY LIFE + SPEAKERPHONE: Up to 10 hours of playback at 70% volume; auto power-off to conserve energy and a built-in mic for hands-free calls.