ECHO 17 2.4 GHz WiFi ; WLAN PCB Antenna, Siretta. The ECHO 17 WiFi ; WLAN Antenna from Siretta is perfect for your WiFi, Bluetooth, Zigbee and ISM applications. The antenna is ideal for portable devices or watertight designs where space is limited. Features ; Benefits of the ECHO 17 -20°C to +60°C operating temperature range 50 ohm impedance Ipex (UFL compatible) connector 2.6 dBi peak gain Vertical polarisation wave dipole radiating element 1.13 mm coaxial cable