Home Stereo Bluetooth Amplifier Receiver With Optical, Phono, And Rca By Product Features Rockville BLUAMP-150 2-Channel Home Stereo Bluetooth Amplifier. 4 Ohms: 75 x 2 watts RMS and 300 x 2 watts peak. 8 Ohms: 40 x 2 watts RMS and 160 x 2 watts peak. Plays Bluetooth/USB/SD. RCA aux input. Phono RCA input for turntables. Optical input. (2) 1/4" Mic inputs for Karaoke with Echo control and mic volume control. (2) sets of RCA Audio Outputs to connect to a subwoofer or another amplifier. Built in Bluetooth 5.0 with 33 foot range. 2 sets of binding post speaker output terminals. Bass/Treble/Balance/Mic Volume/Mic Echo and Master Volume controls. Built-in Cooling Fan. Built-in Pre-Amplifier with low distortion. Class D circuit with great sound quality. Solid metal construction with brushed aluminum front panel. Multi function volume knob . LCD Display / Touch Buttons. Frequency Response (3dB): 50 Hz- 20 KHz. AUX Input Impedance: 10k Ohms. AUX Input Sensitivity: 300mV. Phono input impedance: 47K. Phono input sensitivity: 20mV. Output Impedance: 4-8 ohm. Total Harmonic Distortion(THD): ?0.5%. Signal-to-Noise Ratio(S/N): ?78dBA. USB: Supports WAV/MP3/WMA. 110-220V Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!