Bose T1 ToneMatch audio engine<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Digital multichannel mixer designed for use with Bose L1® sound systems </span></li><li><span class="a-list-item"> Features more than 100 presets </span></li><li><span class="a-list-item"> Presets and firmware updates available free online </span></li><li><span class="a-list-item"> Compatible with L1 compact， L1 Model II， L1 Model 1S and L1 Model 1 systems (L1 Compact and L1 Model 1 systems require separate T1 power supply) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41d%2B3HZ6eiL.jpg" noproxy>