【0.08S Incredibly Low Latency & HDMI Loopout Connect Monitor】-0.08S low latency can ensure a good camera operation experience and real-time monitoring; There are 2 HDMI outputs on the receiver while the transmitter comes with a HDMI input and a HDMI loopout, which is essential for people who need an on-camera external monitor. | 【Channel Scan & APP Monitoring】-Hollyland MARS 300 PRO also comes with channel scan on both the receiver and the App, so people can easily identify the best channel to use on a shooting location ahead of time, or anytime. System upgradation can be made through HollyView App, you only need to click your phone screen, and the upgradation for Hollyland Mars 300 PRO is done! | 【New Difference From HOLLYLAND MARS 300 PRO】-A 3-in-1 thumbwheel switch menu is added to MARS 300 PRO together with a side OLED screen with easy access to the device's power status, channel scan result, video input, channel number etc.. | 【Built-in Antennas】-Hollyland Mars 300 Pro features a built-in antennas for easy setups, efficient shooting, and different shooting applications, for better transmit experience , please vertical install the transmitter and receiver. Mars 300 Pro supports 5-12V wide voltage power supply, including various L-series batteries, different power banks, and type-C (5V/2A) charging. | 【Portable & 1 Year Guarantee】-Lightweight and compact design can meet different applications, such as wedding ceremonies/ adverting / short video /live broadcast and so on.