AKK X2-ultimate US 25mW/200mW/600mW/1000mW 5.8GHz 37CH AV FPV Transmitter VTX with Smart Audio Mic 37channels are all above 5650 and below 5925MHz, which are legal to use in the USA with an amateur radio license. This equipment is being sold under FCCs amateur radio rules. Operators must require amateur radio license to operator legally in the US. Use of amateur equipment without a license or use of equipment on restricted frequencies could subject the operator to significant fines by the FCC. By purchasing this equipment, the user is agreeing that they understand these responsibilities and will operate the equipment legally. Features Support Smart audio 25mW/200mW/600mW/1000mW power switchable One button frequency and power setup OSD configuration using smart audio 7-26V input with 5V output for camera With MIC Specification Input Voltage : 7V-26V Extra Features : Smart audio/1000mW for long range Power Supply : 5V Camera @ under 500mA max. Output Power : 25mW/200mW/600mW/1000mW Antenna Connector : MMCX Cable Connector : JST 6P Dimension : 22 x 32mm Weight : 6.8g(excluding antenna) Package Included 1 x 5.8Ghz 25mW/200mW/600mW/1000mW Switchable FPV Transmitter 1 x Antenna(MMCX to SMA / RP-SMA Adapter) and cable set 1 x Product manual