Manufacturer Keri Systems Incorporated Model IP-2005BX Reader Dimensions 4.2 x 3.0 x 0.38 (110mm x 76mm x 10mm) Color Black Number of Users Up to 500 Reader Frequency 125 KHz excitation, 62.5 KHz data return Operating Temperature -40 C to +65C Voltage Input + 5.14 VDC Read Range Up to 4″ (10cm) Warranty Lifetime Warranty Weight 1.0000