Mars 400S Pro II Support

The casing of the device is made of metal, so the internal circuitry is impervious to external wireless interference. In cases where walkie-talkies with higher power output may potentially cause interference, especially when using HDMI/SDI cables with poor shielding, it could result in a black screen. In such situations, we recommend replacing the cables with ones that have better shielding. Keeping a safe distance of at least 1 meter between the walkie-talkies and the cables is advisable. Opting for a wireless communication system with lower transmission power is another secure solution.

Only the receiver can perform the channel scanning function. Press and hold the button in the middle to enter the menu interface, select “CHANNEL SCAN” from the list of options, and then choose a clean channel to avoid frequency interference.
Channel Scan:
Scan to detect the interference in the surrounding environment.
●   Usable channel marked with a tick sign
●   Unusable channel marked with a cross sign

Only the transmitter can select scene modes. Different scene modes are designed for different application scenarios.
1. HD Mode: Support up to 12 Mbps high bit rate, excellent video quality, ideal for Microfilm and advertising shooting.
2. Focus Mode: Adjust video quality to maintain low latency when interference occurs, suitable for live shooting.

Both the transmitter and receiver support adjusting the fan speed. Long press the button in the middle to enter the menu interface, and then choose “FAN SPEED”:
1. Auto: The device automatically adjusts the speed of the fan according to its temperature (noise up to 55dB).
2. Slow: The fan speed is reduced to a minimum (50dB), and the temperature of the device will be slightly higher.
3. OFF: The fan is completely turned off, the device may get hotter, suitable for scenarios that require absolute silence.

Download the HollyView App from your mobile store and check if your device supports 5G Wi-Fi.
Note: Android devices can only connect to channels 1, 2, 11, 12, and 13, while iPhone devices can connect to all channels.
Steps for connecting the HollyView App:
● Find the WIFI PASSWORD on the menu of the transmitter.
● Enter the Wi-Fi password and connect to the “HLD_XXXXXXX” network.
● Open the HollyView App and Click ” Connect ” to get the video feed.
1. It is advised to turn off the “Wi-Fi Assist” function in the “Cellular” settings for the first time.
2. Turn off the “Auto-join” function in the “Wi-Fi” settings.
3. Permit the HollyView to access your location.

Use the SONY NP-F series battery to power the device such as F970, F750, and F550. You can also use the V-mount battery when you have a D-Tap to DC cable.

The device supports power supply through a standard 5V 2A USB-C charger.
Note: It does not support power supply through a fast-charging USB-C charger. It is not recommended to use a power bank to charge because the charging current and voltage of the power bank drop rapidly. The device’s charging current and voltage needs to be over 5V 2A.

The device supports power supply through the DC adapter with a voltage input from 6-16V.