Features: brand new and high quality Omnidirectional antenna. The PCB circuit inside the antenna integrates a low noise amplifier. The PCB circuit inside the antenna integrates a filter: the bandwidth is 30MHZ. Equipped with ABS engineering plastic tube. Special reminder: Without a biaser, this antenna cannot work properly. Antenna outdoor installation:The antenna is fixed on a conductive object, and the conductive object is grounded to minimize the interference of static electricity. Regarding lightnings arresters, choose according to the local lightnings conditions. Specifications: Length: appropx. 25cm/9.84in (including SMA connector) Gain: 36dB Frequency: 1090MHz Package Includes: 1 x ADS-B LAN antenna 1 x bias 1 x SMA male-SMA male cable, length: about 20cm note: 1. Due to the manual measurement, please allow an error of 1 ~ 3cm, please prevail in kind, thank you! 2. The color will vary depending on the computer screen display and the light of the photo. Please refer to the actual product, thank you.