.Built with pure castaluminum housing, amplifier main unit ensures high quality signals2.Pure copper 15m antenna cable is made in line with SYV503 standard, prolong its life span3.4level amplifier tube with double filters on amplifier board4.Easy wiring and simple operation to its signal transfer device5.No limit to the number of indoor GPS transceivers and maintenancefree6.Larger Coverage Area: The maximum distance is up to 15m (Can be customized) Receiving Antenna: Frequency: 15755MHz + BeidouPolarization mode right circular polarizationAntenna Gain: 3.5dBAmplifier Gain: 37dBNoise Factor: 1.5dBReflection Loss: 14dB (SWR1.5)P1: 10dBmInterference Suppression: 20dB (f0100MHz)Power Supply: 3V5V DCConnector: SMAMounting Way: Thread (M24X1.5) ConnectionVolume: Diameter 96 x 126mmWorking Temperature: 45 to 85Storage Temperature: 50 to 90Humidity: