Presonus Eris E4.5 BT, Active Studio Monitors with Bluetooth Connectivity, 4.5"" Woofer with Kevlar diaphragm, 1"" Tweeter with silk diaphragm, Frequency response: 70 20,000 Hz, Switchable high-pass filter (80 Hz / 100 Hz), Sound pressure level (SPL): 100 dBA (peak), Inputs: TRS (L/R, balanced), RCA pair (L/R), 3.5 mm stereo jack, Bluetooth (5.0), Headphone jack on the front panel (stereo mini jack), Volume control on the front panel with on/off switch and LED, Class AB power amp with 2x 25 W, Switch-on delay and output current limiter, Protection against overheating and subsonic filter, Dimensions: (W x D x H) 163 x 180 x 241 mm, Weight: 3.7 kg (left monitor speaker with power amplifiers), 2.2 kg (right satellite speaker), Includes a 1.5 m mini-jack cable (TRS to TRS), 1.5 m adapter cable (mini jack TRS to 2x RCA), and a cable for connecting the left to the right speaker