For future reference, you actually don't need to hold the Equinox wireless button it until it pairs, but just long enough to put the Equinox in pairing mode (about 5 seconds, similar to the long press to get the headphones into paring mode). Unless the Equinox has not yet been used or has just been factory reset, a quick press of the wireless button just turns the radio on and off. You need to press for 5 seconds to go into pairing mode. If the headphones have been successfully paired, then they will subsequently automatically connect as long as the wireless radio on the Equinox is turned on. Glad it worked in any event.
From p. 56 of the manual:
3. Press the wireless button on the side of the EQUINOX control
panel for 5 seconds until the Wireless icon starts to flash rapidly.
For first-time use of the EQUINOX, or following a factory reset, a
short press of the Wireless button will immediately start the pairing
sequence.
4. The EQUINOX first attempts to pair with a WM 08 module for
15 seconds, indicated by the Wireless icon flashing on the LCD.
If a WM 08 is not found within this time, EQUINOX will then
attempt to pair with Bluetooth® headphones for 5 minutes, or
until pairing is complete. This is indicated by the Bluetooth®
icon flashing on the LCD.
The Pairing process can be interrupted at any time by pressing
the Wireless button.
5. If pairing is successful, the Bluetooth® and Wireless icons on the
LCD will remain steady on. The headphones will beep and the
Status LED will flash blue once every 3 seconds.
If the pairing is not successful within 5 minutes of being
initiated, the headphones will go into standby mode
