This filter has a 1dB bandwidth of 25MHz and a steep cut-off characteristic. For GSM900 testing in the 935 - 960 MHz frequency range, it effectively filters out out-of-band signals, reduces noise, and increases dynamic range. Model: FBP-947s Impedance: 50 Ohms Center frequency: 947 MHz Passband (1dB bandwidth): 935 to 960 MHz In-band insertion loss: Less than 2.0 dB (typ: ~ 1.5 dB) Maximum Carrying Power: 100 mW (20 dBm) Interface: SMA-M, SMA-F Colour:As shown Material:Metal Package Contents: 1 x SAW bandpass filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.