Tech 21 MM1 MIDI Mouse<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Battery operable and provides a minimum of 200 hours usage. </span></li><li><span class="a-list-item"> For stage and studio applications. </span></li><li><span class="a-list-item"> Large， non-glare LED display can be read from any angle， in daylight or darkness. </span></li><li><span class="a-list-item"> Operable with standard 9V alkaline batter (not included)， optional power supply (Tech 21 Model #DC2) or phantom power via the MIDI cable. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51jE4mlTKOL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/518JzCXQurL.jpg" noproxy>