Text Box: Choice of Start Up Modes Automatic Detection of Malfunction 3 Stage Battery level Indication Functions Selectable via PC Software Built In Buzzer & LED Hardware & Software Interference Correction >4x109 ID Codes O/P Contacts 10A 250V Power Consumption Approx 40mA Power Supply TX 2 x AA Alkaline / NiCad RX 48 / 110 / 230 / 415VAC 12-24VDC Dimensions TX 130x45x22mm 120g RX 185x85x85mm 550g