The versatile AtlasIED TSD-RL21 2x1 mic/line mixer is ideal for applications where paging, public address, and BGM music is required. Use as a standalone remote mixer or in conjunction with AtlasIED power amplifiers in applications such as conference center meeting rooms, football stadiums, gymnasiums, retail/hospitality or other areas requiring versatile, multi-source mix control.Channel one may be configured via rear panel dipswitch to accommodate mic or line level while channel two features a stereo summing RCA line level input. Both inputs are adjustable by front panel controls with removable knobs, which may be easily replaced by security, covers to prevent tampering. The remote level control feature allows use of the AtlasIED AAVC-10K (or equivalent) decorative wall plate control for convenient remote adjustment of either the entire mix bus or RCA input 2 only (the typical BGM input). The TSD-RL21 is highly efficient and meets Energy Star standards as one 24V DC power supply (available separately) can power multiple Atlas Time Saving Devices. Unit requires Power Supply that is sold separately for proper function, multiple TSDs can be powered with one power supply based on current requirements. This unit has a power requirement of 60mA so any of the available TSD power supplies can be used with the unit. For multiple TSD applications use the TSD Power Calculator to determine the proper power supply needed.