User Manual

HD 4.40BT | 5
The HD 4.40BT Wireless headphones
Bluetooth
The headphones comply with the Bluetooth 4.0 standard and are compatible with
all Bluetooth 1.1, 1.2, 2.0, 2.1, 3.0 and 4.0 devices with the following Bluetooth
profiles: HFP (Hands-Free Profile), HSP (Headset Profile), AVRCP (Audio Video
Remote Control Profile) and A2DP (Advanced Audio Distribution Profile). The
headphones provide wireless freedom to give hands-free convenience during
phone calls or when listening to music.
NFC
Near Field Communication (NFC) is a short-range wireless technology that en-
ables connection and communication between NFC-capable electronic devices
by placing them near one another or with a single touch.
aptX®
With aptX® audio coding, you can be assured of crisp, pure and full stereo
sound. It allows you to not only hear, but experience and feel the audio as it was
intended. Utilizing aptX®, Bluetooth technology can now offer wireless audio
quality that is indistinguishable from the highest quality wired connection.