SIGMA SPORT ONYX EASY Manual page 9

. MEASURING THE HEARTBEAT
You can enter another word with up to
10 characters under the ONYX EASY font
(my name function). Please refer to Chapter
3.2 "Setting unit".
To activate your ONYX EASY hold down any
button for two seconds. The clock changes to
active mode and you enter the training main
menu.
Note: At the start always refer to the tree
diagram shown in 2.1.
Synchronisation of Watch and Chestbelt
Your ONYX EASY is equipped with a digitally coded chestbelt that
enables you to have interference free training.