Feature:Please check the connector of the device before purchasing.1. It is an internal omnidirectional antenna with 9 dBi2 gain. Compatible with RAK 2, Nebra Indoor, and Bobcat 300 and more.3. Use with a Nebra, Bobcat, or RAK miner to extend range. This is an indoor antenna and is not intended for outdoor use. We recommend placing this near a window or in a more optimal place to send and receive than where your miner is currently located. Specifications:Gain: 9dBiVSWR: lt; 2.0 Impedance: 50 ohm Direction: Omnidirectional Antenna Connector: SMA Male Connector Antenna Height: 19.5cm Operating Temperature: -20°С - +80°СStorage Temperature: -30°С - +85°С List Packing: 1 x AntennaNote: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Manual measurement, please allow 1-10mm error. Thank you for your understanding.