PreSonus Eris E4.5 BT Active Monitors with Bluetooth Designed by a proven leader in studio reference monitors, Eris E4.5 BT speakers deliver studio-quality sound with the convenience of Bluetooth® wireless technology. In addition to Bluetooth wireless connectivity, you get the flexibility of rear-panel, ¼-inch TRS and RCA inputs; a front-panel 1/8-inch stereo line input for use with mobile audio devices; a handy front-panel volume control; and an integrated headphone amplifier.  Experience loud, clear audio thanks to 50W of onboard Class AB power. Want more bass? Adjust the speakers’ response to taste with low- and high-frequency tuning controls. The Eris E4.5 BT speakers’ elegantly compact form is well-suited for any home environment, yet they’re compact enough to fit almost anywhere. making them a great choice for music lovers, content creators, and gamers. Features: 4.5-inch, woven-composite, low-frequency transducer 41-inch (25 mm), ultra-low-mass, silk-dome, high-frequency transducer 450W (25W/side) Class AB amplification 4Bluetooth 5.0 wireless stereo input 4RCA and 1/4-inch balanced? TRS rear-panel inputs 4Front-panel 1/8-inch stereo Aux In for use with mobile audio devices 4Integrated headphone amplifier with front-panel stereo 1/8-inch jack 4High- and low-frequency controls let you fine-tune the speaker’s response 4Front-panel Volume control 4Rear-firing, round bass-reflex port