SONY Wireless Stereo Headset White MDR-EX31BN / W. 1 product with a receiver includes a receiver unit. We also deduct handling fee. Total noise suppression amount (TNSR): about 17dB. Effective frequency band: 100-4 000Hz.
They are flush fit ceiling speakers with white grills, no need for screws these grills attach to the speaker body using spring hooks which also secure the speaker to its location. They are 100v line speakers with option for two levels of output 3.3kohm(3w) and 10kohm(1w) with simple push fit cable connection.