The CRESTRON ST1550C is a discontinued wireless touch panel featuring a 5.7-inch passive matrix color LCD display with QVGA 4:3 ratio (320x240 pixels) and 8-bit 256-color capability. This operator interface unit operates as a 1-way RF transmitter at 433.92 MHz, equipped with a resistive membrane screen and fluorescent backlight. Power requirement: 120V AC at 60Hz.