Aiwa Pro Enigma MI-X450 User Manual page 6

Product Overview
Live Broadcast Function Effect
Live Broadcast Function Effect
Keypad (Number 0-9)
For double-digit numbers, press both
numbers at the same time for two (2)
seconds. (For e.g, pressing 1 & 0
together will give you 10)
Record (Record only when USB/TF
Card is inserted)