Retekess TT125 Instructions page 7

Function description
Turn on/Turn off/Lock
1.Toggle the switch on the top of the product to "ON" to turn
it on; to "LOCK" to mean the channel is locked; to "OFF" to
turn it off;
2.When the product is in the LOCK state, all the buttons of
the product are locked; the function of the buttons cannot
be unlocked until it is turned to "ON";
3.If the product is in the "ON" state, it will enter the locked
state after 30 seconds without any operation; if there is no
operation for 30 seconds, the product will enter the
off-screen state; if the product is in the "LOCK" state, it will
enter the locked state after 30 seconds. In the case of
human operation, it will enter the off-screen state after 30
seconds;
4. When the transmitter is in the "LOCK" state, the
one-button mute function of the product is not locked; when
the receiver is in the "LOCK" state, the VOL-/VOL+ function
of the product is not locked;
Transmitter
Unlock
Turn the toggle switch to the "ON" position, the product is
unlocked, and all buttons can operate normally.
Lock
Turn the toggle switch to "LOCK"Gear, the product is in a
locked state; Or the product is in an unmanned state,30It
automatically enters the locked state after seconds. In this
state,Do not lock"One-button mute" key function;
Channel adjustment
In the unlocked state, short press the "CH+" or "CH-" button
to change the channel. Long press the "CH+" or "CH-"
button to quickly increase/decrease the channel in the form
of tens.
Mute Function on
In the unlocked state, press " " to turn on mute function,
the screen will display the icon " ", the receiver can no
longer receive the voice signal from the transmitter.
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