Suitable for Redback® radio microphone installations requiring extended operating range ie: supermarkets, shopping malls, function centres etc. Provides 9dB of gain at 800MHz enabling installation up to 50m from the receiver when using low loss 50Ω coaxial cable (see Altronics W 4920). Very unobtrusive once installed. Power is received from the UHF receiver. May be used in conjunction with the C 8844 combiner for increased coverage. Connects via 50Ω BNC. Ceiling hole cutout 32mm. Max ceiling thickness 15mm. Frequency Range: 520-950MHz.