Features: brand new and high quality. Operating frequency: 890-960MHz. Power gain: 30dB. Long-term stable operation. This RF amplifier, easy to use. This is one professional amplifier module with standard SMA female connectors. Package Included: Operating frequency: 890-960MHz Power gain: 30dB Maximum output power: + 33dBm (2W @ 5V, 1.2A) + 36dBm (4W @ 6V, 1.8A) Harmonic suppression: 48dBc Working current: 1.2A (5V, recommended operating voltage) Supply voltage: 5VDC System impedance: 50 ohms RF interface: SMA female (female screw hole) Size: 50 x 50 x 15mm / 1.96 x 1.96 x 0.59inch(Not including the bulge size) Quantity: 1pc Product weight: 55g Package Included: 1 x RF Amplifier Note: No load or loaded impedance for long use. Do not increase the working voltage use, although it can promote the power, the consumption of the product increases, and the reliability turns bad. Pay attention to static measures. The equipment has a joint location. Connect the RF interface first and then the electricity when using.