|Frequency Response||18 Hz to 22 kHz|
|Maximum Sound Pressure Level (SPL)||113 dB at 1 kHz / 1 Vrms|
|Total Harmonic Distortion (THD)||0.5%|
|Number of Mics||2|
|Frequency Response||100 Hz to 10 kHz|
|Supported Audio Codecs||aptX|
|Audio Connector||1/8" / 3.5 mm Angled|
|Cable Length||4.6' / 1.4 m|
|Battery Chemistry||Lithium-Ion Polymer (LiPo)|
|Capacity (mAh)||600 mAh|
|Recharge Time||2 Hours|
|DC Input Power||5 VDC at 400 mA|
|Weight||7.9 oz / 225 g|
|Package Weight||1.15 lb|
|Box Dimensions (LxWxH)||9.1 x 7.2 x 4.0"|
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The HD 4.40 BT Wireless Bluetooth Headphones from Sennheiser feature high-quality sound and Bluetooth 4.0 technology in a sleek and foldable design. These headphones can be used to listen to music and answer calls, and are well suited for use with smartphones, MP3 players, tablets, and other portable devices.
The HD 4.40 BT are built to be portable and can make travel more pleasurable. With their over-ear design, and deep, ergonomically designed earpads, these headphones offer lasting comfort, even during extended listening sessions. Their robust, foldable-headband design can be easily and compactly stored in the supplied protective case.