Please watch the video to correctly pair your Sleepphones to your device.
Take note:
To put the Bluetooth module into pairing mode, press the middle button (power button) for 5 seconds or more. If you press it for less a slowly blinking red light will show
Once in pairing mode, it will show a rapidly blinking red light.
Select Bluetooth devices on the music player device you wish to pair the SleepPhones with.
Then just choose Acoustic Sheep from your device to pair it.