Hörmann 2-channel-relais-receiver HER2, exact 26,975 MHz for RC2000A remote controls (2 channels) as well as for Hörmann door operators
and other operators. With 2 potential-free relay outputs.
Separate antenna in aluminium case. 
protection type: IP 65 with 7m connecting cable
3-wired, evaluating unit inside
Operating voltage: 4V AC /DC or 230-240 V AC
Switching capacity: 
30V DC / 2.5 A (resistive load)
250V AC / 500 W (resistive load)
Functions: impulse, ON/OFF, 3-minutes-light