Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate this
equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
This equipment complies with FCC RF radiation exposure limits set forth for an
uncontrolled environment. To maintain compliance with FCC RF exposure
compliance requirements, please avoid direct contact to the transmitting antenna
during transmitting.
Version 1.00 JANUARY 2022
911 Mariner St., Brea, CA 92821
PH: 714.257.0300 FAX: 714.257.0600
TOLL FREE: 800.666.2654
WWW.PRYME.COM
The PRYMEMAX Muff Headset has an internal Lithium-Ion rechargeable battery pack which must be
charged prior to operation. A fully charged battery will provide approximately 10 hours (or more) of
operation before needing to be recharged. However, operating time can vary depending on usage and
the condition of the battery pack. Recharge the battery regularly.
Pressing and holding this button
down activates the Push-to-Talk
feature of the two-way radio or
BTH-900-MAX-EMB is different
than the BTH-700-MAX-HMB and
If the Headset is paired with a cellular
telephone, this button can be used to
manage telephone functions such as
answering or hanging up a call.
This micro-USB jack is used to connect
the supplied charge cable to the Headset
to recharge the device’s internal
lithium-ion battery pack.
Received calls are heard through
HEADBAND / HELMET MOUNTING CLIPS
Depending on the model, the headset may
be furnished with mounting clips for
attaching to a hard hat (BTH-700-MAX-HMB),
an over-the-head band (BTH-800-MAX-OHB)
or a behind-the-head band
These buttons are used to adjust
the volume level of received calls
heard through the Headset.
POWER BUTTON / STATUS LED
Pressing and holding this button for
one second turns the PRYMEMAX
Muff Headset on or off. This button
is also used to place the Headset in
pairing mode so that it can be
connected wirelessly to a
PRYMEBLU adapter, two-way radio,
or a cellular telephone. The status
LED behind the button flashes
messages that let the user know the
status of the device. For a complete
list of LED messages, see page 6.
To charge the PRYMEMAX Headset:
1. Ensure the PRYMEBLU Headset is turned off using the Power Button.
2. Plug the supplied wall charger into a standard 120-volt AC outlet.
3. Plug the charge cable into the AC wall charger and then into the charge jack on the Headset. You
will need to remove the protective rubber cover that is inserted into the charge jack. (To prevent dust
and moisture from damaging your Headset, always ensure this cover is in place when you are not
4. Once the charging process has begun, the LED indicator on the Headset will show a continuous red
light. When the battery is done charging, the LED light will turn off.
5. Typical charge time is approximately 4 hours. Actual charge time will vary depending on several
factors including the battery’s charge state, condition, and age.
6. Disconnect the charger from the lapel mic when charging is completed.
- Use only the wall charger supplied by the manufacturer.
Do not use any other charger.
- Do not use a wall charger that appears to be
damaged. (Example: frayed wires, melted plastic, etc.)
Contact PRYME to get a new manufacturer-approved
- Do not tamper with or modify the Headset or charger.
- Always turn the power switch to the off position when
P-CBL-USB-MICRO charger cable and P-CHA-BT-USB
wall charger included with the Headset.
PAIRING WITH A SMARTPHONE OR TWO-WAY RADIO
The PRYMEMAX headset is designed to work with PRYMEBLU wireless adapters, two-way radios with
internal BT made by BK, Icom, and Kenwood as well as smartphone and tablets running either the Android
or Apple iOS operating systems. Prior to normal operation, the handset and headset must be paired
together using the following process:
1. With the headset powered off, activate the pairing mode by pressing and holding the Power button
until the status LED flashes BLUE-RED-BLUE-RED continuously in sequence.
2. If pairing with a PRYMEBLU adapter, place the adapter into pairing mode following the instructions in
the device's manual. Then proceed to step 5.
3. If you are pairing the microphone with a two-way radio, follow the manufacturer's instructions to have
the radio scan for nearby headset devices. Once it finishes scanning, select the device named "BTH-PTT"
from the list of nearby devices. Then proceed to step 5.
4. If you are pairing the microphone with a smartphone, make sure that the smartphone's BT slider is
turned on and then use the phone's BT menu to scan for nearby devices. Select the device named
"BTH-PTT" to pair with the phone then proceed to step 5.
5. Keep the radio or handset and headset near each other and wait a few seconds. The devices will pair to
NOTE that on some Kenwood radios you may hear a ring tone. If so, press the Phone Answer button on the
headset to confirm that pairing.
Reconnecting a Previously Paired Headset and Phone
Once the headset and handset have been successfully paired together, both devices will remember that
connection. They will reestablish their link whenever the headset and handset are both powered on and
within range of each other, as long as the BT radio is enabled in the handset. Re-establishing this
connection can take 10-60 seconds.
If the handset and headset to not automatically reestablish their link, simply press the handset button on
the PRYMEMAX headset to restore the connection.
BTH-800-MAX-OHB
SHOWN
PRYMEMAX BTH-700-MAX-HMB
PRYMEMAX BTH-800-MAX-OHB
PRYMEMAX BTH-900-MAX-EMB
Made in Taiwan
PRYME® PRYMEBLU®, and PRYMEMAX™ are trademarks
owned by PRYME Radio Products, Brea CA.
All other product or service names are the property of their respective owners.
© 2022 PRYME Radio Products, Brea CA. All Rights Reserved
ADJUSTABLE BOOM MICROPHONE
The Muff Headset boom microphone
picks up the user's voice audio to
BTH-800-MAX-OHB BTH-900-MAX-EMB
PRYMEMAX™ BTH-700-MAX/800-MAX/900-MAX
Wireless Dual Muff Headsets
