Lifestyle SA-2 amplifier (Discontinued by Manufacturer) Two-channel stereo operation, 40 watts (minimum) per channel Size - 31/2H x 141/8W x 51/2D / Color - Black Room selector switches assign the amplifier to a specific room and radio frequency remote control. Mini-DIN expansion input and output easily connects multiple Lifestyle amplifiers to the Lifestyle media center in a daisy chain whenever twoor more pairs of speakers are desired in a specific location (for example, outdoors or in a large hall) Wired Volume Control (VCA) input provides connection for an on-wall volume control (can be used with or in place of a Lifestyle radiofrequency remote control)