Passive RF filter, possibly most useful for reducing spill from transmitters in the bag. Bear in mind that 3dB loss will halve your output power
Tiny! 34.3mm x 17.5mm x 7.7mm
Impedance: 50 Ohms
Center frequency: 836 MHz
Passband (1dB bandwidth): 824~849 MHz
Band insertion loss: < 2.5 dB (typical value: 2.1 dB)
Maximum load power: 100 mW (20 dBm)