we have many kind of models. each has different specification and price.for example,we have 7281-32,7263-28,241,281.You can look them in our web:

http://www.hongdaelectric.com/bidai/show6%2B%2B.asp?cpfl=Amplifier

Specifications:
Bandwidth: 44 - 862MHz
Gain: 32dB
Flatness: 1dB
Gain control range: 20dB
Noise figure: 4.5dB
Output capability: 1 10dB<#&956;>V
Input return loss: 12dB
Output return loss: 14dB
Power requirement:
2360VAC 50HZ at <5W
Operating temperature range:
-10oC-40oC