The indicator is steady green, indicating that the video is normal 
The indicator flashes red, indicating that it is disconnected
The indicator fast flashes red, indicating that the device is pairing
 

The indicator light is steady green, indicating that the video is normal 
The indicator light flashes red, indicating that it is disconnected
The indicator light fast flashes red, indicating that the device is pairing

The indicator light is steady orange, indicating that the video is normal            
Not bright, indicating that no video was received
 

Step 1: Please prepare an OTG cable and U-disk for upgrade. U-disk should be FAT32 format, not NTFS.

Step 2: Unzip the upgrade file, copy the “hldUpgrade_rx.img” and “hldUpgrade_tx.img” into root directory of the U-disk 

Step 3: Turn off the device, and connect it with U-disk by USB-OTG cable

Step 4: Turn on the device
The link indicator will flash blue (U-disk is identified)
The link indicator turns green and flash quickly (writing in files, around 3-5s)

Step 5: Both TX and RX should be upgraded. Long press pair button on TX and RX when upgrade finished: link indicators on TX and RX turn red and flash quickly, need to wait for few seconds; link indicators on TX and RX turn green and stay on, pairing successful.

Step 6: When upgrade is finished, long press channel button on RX, it can show OSD information on the screen.

RX 2 HDMI interfaces can output signal at the same time. When RX connected with camera, the HDMI-loop out interface can output video signal to external monitor

DSLR camera like Canon 5D Mark III will need to set up “screen stays on when connected with external monitor”

Mars 300 can output the same video format as that of the camera. Mars 300 will not convert the video format outputted by cameras’ HDMI interface. Mars 300 supports 1080p60, 1080p50, 1080i60, 1080i50, 720p, and other common video formats
 

F970 battery can work around 6 hours, F750 battery can works around 4 hours, F550 battery can works around 2.5 hours. Different brand batteries has different capacity, and support different working hours
 

Both transmitter and receiver can be powered by SONY F550/F750/F970 batteries; They use the standard 12V AC adapter for power supply

Our DC port and DC adapter are with locks. When connecting the DC adapter, be sure tighten the lock. Otherwise, there will be no power

It is normally because there are other interference in the field, double-click the transmitter CHENNEL button, and change to another channel
 

Double-click transmitter CHANNEL button, change to next channel. It is normally because there are other wireless singnal interference. Switch the channel can avoid the interference

Check the transmitter video light steady on or not, if not, the problem may come from camera HDMI output. You need to modify camera settings or change another HDMI cable to try

Double click the CHANNEL button, the transmitter will switch to the next frequency point. During the switch, the Link light will turn red and start flashing, and then turn green and normally on, which indicates that the frequency point is switched successfully

Disable encryption on receiver main menu and single press to select “SCAN CHANNEL”, then the receiver detect the electromagnetic environment automatically
  “√” Means the electromagnetic environment of the channel is clear and available
  “╳” Means the channel is occupied, not available
  Note：please turn off TX when using this function

Press receiver “MENU” button for 6 seconds, enter main menu
 1.“SCAN CHANNEL”-Auto scan channel function
 2.“RSSI OPTION”--Received signal strength indication
 3.“SECURITY”-Encryption, decryption and device ID check
 4.“VERSION”-Software version
 5.“EXIT MENU”-Return to main menu

Select “SECURITY” to enter encryption pair option
1. “DISABLE”-Transmitter encryption disable
2. “ENABLE”-Enable transmitter encryption and start to pair
3. “PAIR  ID”-Transmitter ID, to check device ID number
4. “RETURN”-back to superior menu

Press MENU button for 6 seconds to enter menu, select “ADVANCED” to enter TX fan option.
1. “BASIC MODE ”-Turn off replay without delay function, smart cooling fan and reduce power consumption
2.“SMART MODE ”-Turn on replay without delay function, turn on or off smart cooling fan automatically  according to temperature
3. “RETURN”- back

1、Avoid placing multiple sets of transmitters and receivers on a straight line
2、Adjust the receiver’s position and angle according to the camera position

1、Place RX on Tripod
2、Tripod Height >1.7m
3、Set up the receiver upright facing the transmitter
4、Move receiver away from obstacles；Keep the receiver at least 2 meters away from the obstacle if the obstacles cannot removed
 

The signal is the strongest when the transmitter is set upright facing the receiver

1、To set up the antennas, screw the root of the antennas by hand
2、Antennas should be set up in a claw & fan shape for stronger signal radiation and farther transmission distance 
3、The receiver should be placed vertically, and it’s plastic part should face the transmitter in order to achieve the furthest transmission range and the best receiving performance

Yes, we can offer extra antennas and receiver, you can contact us directly or contact with our local dealer for purchase.
 

Cosmo products are no-latency professional ones. Mars series are designed for cost sensitive applicaitons.

All COSMO series transmitter and receiver can be used interchangeably, just make sure the transmitter and receiver stay in same channel.
 

Hollyland 1 Cosmo transmitter can support up to 4 receivers in one environment.
 

You can leave a message for us at CONTACT US page. 

Our goal is to ensure your complete satisfaction. We offer one year aftersales service to customer, if you have any product quality problem, you can leave a message at contact us page. Besides, you can contact with our local dear, the dealer information is in: Where to buy.
 

1. Dealers: Find your local dealer at: Where to buy.
2. Contact us directly at: Contact US

Currently our Screen Link300 for big LED Display support DFS. The others support 5.8GHZ ISM Band, more new products with DFS will be released. More details please contact with us.

 

Have more questions? Please Contact Us. 

 

1. Check if SDI or HDMI input or output cable is plugged well;

 

2. checks how many receiver side ‘RSSI’ LEDs are lit, there should be 2-3 RSSI LEDs lit if the user want to get better video quality; if there is only 1 RSSI LED lit, that means the received wireless signal is weak and should shorten the transmission distance.

 

Have more questions? Please Contact Us.

1. Please check TX and RX power first, and see if TX or RX battery is powered from external power;

 

2. Check if TX antennas and RX antennas are installed right. After that, check the TX and RX ‘Link’ indicators light on, if the‘Link’ indicators light off, then check if TX and RX are on same frequency;

 

3. Check the ‘Video’ indicator, if TX ‘Video’ indicator is not lit, then check if the SDI or HDMI cable is plugged in and a video source is present;

 

4. Finally may check input video format is compatible with this product specs.

 

Have more questions? Please Contact Us.

1. Check the Bluetooth earphone power first;

 

2. It may cause by the Bluetooth earphone and Bluetooth module is not paired, and then please follows the steps to pair them;

 

3. Bluetooth earphone the working distance up to 5-6m, please check if it works over the distance. If it is yes, please go back to its working distance.

 

Have more questions? Please Contact Us.

Some of Hollyland products with auto-selected function with Frequency display such as Cosmo1500. The system will select automatically the lowest interference frequency to ensure the RF with best performances.

Have more questions? Please Contact Us.