DJI LIGHTBRIDGE 2 DJI Ground Unit / Controller - Air Unit - Mobile Device Holder - DJI Warranty Transmission Distance: Outdoor And Unobstructed: 1.2 miles (2 km) Air System: EIRP: 100mW at 2.4GHz Air System: Operating Frequency: 920.6MHz - 928MHz (Japan) 5.725GHz - 5.825GHz2.400GHz - 2.483GHz Air System: Antenna Gain: 2dBi at 2450MHz