UNITED Max 75 User manual

United Headsets
Max 75 wireless headset

1. Max 75 Overview
Left Right
Mute/unmute microphone
Volume down
(short or long press)
Volume up
(short or long press)
LED status indicator
(4 bars in total)
On/Off/Bluetooth pairing
USB-C charging
(full charge takes about 3 hours)
Call answer/end
(Microsoft Teams call answer/end)

1.1 Accessories included
Bluetooth adapter
United Headsets BTD75（Optional）
USB-A to USB-C charging cable Carrying bag

2. How to wear the headset
2.1 Recommended way of wearing
LeftRight
2.2 Adjusting the headset
1. According to the usage habits, adjust the headset to make the
headset fit comfortably on the head.

2.3 Flattened storage
The earmuffs of the earphones can be rotated and flattened for easy storage.
2. When using the microphone, the microphone boom can be adjusted.
Maintain a distance of two fingers to the mouth.

3.2 Use a compatible power adapter
The headset can be charged using a compatible 5V output charger. It is
recommended to use the included charging cable to charge the headset.
3. How to charge the headset
3.1 Charge with USB charging cable
Plug the charging cable into the headset and plug it directly into the USB port
powered by the computer for charging.
It takes about 3 hours to fully charge the headset. The battery lasts about 24
hours when fully charged.

3.3 Use as a USB headset
Plug the charging cable into the headset and plug it directly into the USB port
powered by the computer.The headset will automatically switch from wireless
mode to wired mode. Now the UH Max 75 can be used as a USB headset.
4. The meaning of the LED indicator
●●●● When the power is turned
on, the 4-bar indicator lights turn blue
in sequence (the battery is fully
charged)
○●●● When the power is turned
on, the 3-bar indicator lights turn blue
in sequence (indicating that the
battery has consumed one bar of
power, and so on)
LED status
indicator
(4 bars in total)
LED status
indicator
(4 bars in total)
¤ ○ ○ ¤In pairing mode, the 1 and 4
indicators flash blue alternately
○ ¤ ¤ ○ When an incoming call
comes in, the 2 and 3 lights
alternately flash blue
LED status
indicator
(4 bars in total)
LED status
indicator
(4 bars in total)

○●●○ During a call, the indicator
lights 2 and 3 are solid blue
●○○○ 1 The indicator light is solid
red, indicating that the battery power
is lower than 20%
LED status
indicator
(4 bars in total)
LED status
indicator
(4 bars in total)
¤ ○ ○ ¤Do not disturb mode, 1 and
4 lights alternately flash red
○●●○ The microphone is muted,
and the 2 and 3 indicators are solid
red
LED status
indicator
(4 bars in total)
LED status
indicator
(4 bars in total)

5. Connection method
5.1 Connect via dongle
Plug the included UH BTD75 into a USB port on your PC/laptop. The UH
Max 75 and UH BTD75 are pre-paired, and are ready to use right out of the
box. The maximum Bluetooth range is about 30 meters.
To listen to music with the headset, you may need to set the UH BTD75 as
the playback device in the audio settings of your PC/laptop’s operating
system.
1. If you need to re-pair the UH Max 75 and UH BTD75, please press
and hold the reset button on the UH BTD75 USB dongle.
2. Press and hold the reset button until the LED indicator flashes red
and blue alternately.
3. Turn the headset switch to the Bluetooth position and keep it in this
position until the blue LED indicators 1 and 4 of the headset flash
alternately. (Please refer to 5.2)
4. Wait for the UH Max 75 and UH BTD75 to pair again. After the
pairing is completed, the LED indicator stops flashing.
indicator light
reset/pairing button

5.2 Direct connection via Bluetooth
1. Slide the on/off switch to the Bluetooth position and hold it there
until the 1 and 4 indicators flash blue alternately.
1. Go to the smartphone Bluetooth menu and select UH Max 75
from the list of available devices.