A 2-digit customer turn display ideal for use in busy shops or offices in need of displaying next customer's turn. Includes on-board Up, Down and Reset switches to modify the count and a large push-button switch that can be connected to one of these for remote operation (wire not included). Also includes Ding-Dong sound generator. Supply voltage: 5VDC (regulated). Recommended adapter: RPR-51A5-P5.