CXR/2×1-1S Switch Modules have an A, a B and an Off state. Both relays may be on at once. Single pole modules ground the outer conductor of the BNC. 50 ohm Bandpass of DC to 300 MHz. Isolation of -50 dB to 80 MHz. Switched Power = 10 Watts BNC 50 or 75 ohm connectors. 100 Million cycle relay life. 1 ms switch times.