If you’re having trouble connecting your earbuds via Bluetooth
Check your earbuds and device are charged.
Ensure your earbuds and device are within 10 feet (about 3 m) of each other.
Check you’re connecting to Denon PerL XXX, not Denon PerL XXX [LE].
Denon PerL XXX [LE] is the Denon PerL low-energy mode, which will automatically connect after you’ve connected to Denon PerL XXX.
Move away from other Bluetooth devices, microwaves and wireless routers to avoid interference.
Further troubleshooting:
Re-start your device and try pairing your earbuds with Bluetooth again.
If you’ve previously paired your earbuds with Bluetooth, then remove your earbuds from your device’s paired device list and try pairing again.
Reset your earbuds.