Memorex MK 1995 Instruction Manual page 13

Note : After the MODE button is pressed, the Up(▲) or Down(▼)
button must be pressed within 8 seconds, otherwise, the unit
will revert back to Normal mode.
Selecting Main Channels (1-15)
Your MK1995 GMRS Radio has 15 main channels.
To select the channel,
Press the Up(▲) or Down(▼) button to select the desired channel.
Operation
Push to
select
channel
10