Speaker Edifier R1280DB White/Silver

Active bookshelf speaker system with 42W total power output, Supports Bluetooth, Optical, Coaxial and Dual RCA inputs, Bass, treble and master volume dials located on the side panel, Wireless remote control for volume adjustment and mute, Calibrated, flared front-facing bass reflect port, 100% MDF wooden enclosures to minimize acoustic resonance. 

Power output : L/R: 21W+21W RMS
Signal to noise ratio : _85dBA (A)
Noise level 25db
Input sensitivity : LINE IN1: R/L:450±50mV
LINE IN2: R/L:550±50mV
OPT/COA: R/L:500±50mFFS
Bluetooth: R/L:700±50mFFS
Frequency response : 55Hz-20KHz
Bass unit : 4 inch (116mm)
Tweeter unit : _13mm silk dome tweeter