Trust WIRELESS SECURITY RECEIVER 100R, 2.4 - 2.485 Hz, 1.57 x 4.33 x 5.79" (40 x 110 x 147 mm) Trust WIRELESS SECURITY RECEIVER 100R. Frequency range: 2.4 - 2.485 Hz. Dimensions (WxDxH): 1.57 x 4.33 x 5.79" (40 x 110 x 147 mm)