Comparing to recording video from your video receiver, DVR VTX has its own advantage. It provides us clear footage directly from the FPV camera, so it minimizes signal interference from 5.8GHz transmission. If you are finding an FPV VTX with DVR(digital video recorder), this one may be the right one! Feature:Novel design FPV VTX. The design of this FPV VTX is different from other DVR VTXs. It has a double layer stacking structure, one for video transmission, one for DVR. It can be normal use though you remove the DVR board! Onboard Microphone. Hearing is important when flying your quad since you can learn more about the drone situation through the audio feedback.20x20 VTX. It has taken the Infinite DVR and cut the mounted size to only 20mm! You can mount it directly to your FC. Specifications: Input voltage: 7V-28V Power supply: 5V output for camera Output power: 25mW/200mW/600mW/1000mW Cable connector: Solder pads Antenna connector: MMCX Dimensions: 30.5x30.5mm Weight: 8.8g (without antenna) Package includes: 1x VTX 1x Cable 1x Pitail 1x Product manual Note: 5645,5925,5945(E4,E7,E8) channels are not available due to FCC regulation. Selecting 5645/5925/5945(E4/E7/E8) will be invalid action. Please read the Info before purchasing. Due to the equipment need being sold under the FCC’s amateur radio rules. This product requires an amateur radio license to operate legally in the US. Operators must abide by all applicable laws and hold an amateur license to operate this equipment. Use of amateur equipment without a license could subject the operator to significant fines by the FCC.