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2. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...

3. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   Mobile phone or smartphone headsets may include a volume control, microphone and 3.5mm plug. Mobile (cellular) phone headsets are often referred to as handsfree. Older mobile phones used a single earphone with a microphone module connected in the cable. For music-playing mobile phones, manufacturers may bundle stereo earphones with a microphone.

4. List of Bluetooth profiles - Wikipedia

   en.wikipedia.org/wiki/List_of_Bluetooth_profiles

   Most Bluetooth headsets implement both Hands-Free Profile and Headset Profile, because of the extra features in HFP for use with a mobile phone, such as last number redial, call waiting and voice dialing. The mobile phone side of an HFP link is Audio Gateway or HFP Server. The automobile side of HFP link is Car Kit or HFP Client.

5. List of Bose portable audio products - Wikipedia

   en.wikipedia.org/wiki/List_of_Bose_portable...

   SoundLink Mobile (first version) The SoundLink Mobile was released in 2011 as a smaller, battery-powered model. [5] [6] It used Bluetooth to communicate with the source device. [7] Reviewers praised the unit's audio quality, but criticized the high price and lack of a microphone (to enable its use as a speakerphone). [8] [9]

6. Comparison of open-source mobile phones - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_open-source...

   3: Cameras and the microphone, Wi-Fi and Bluetooth, and baseband processor. All three also shut off sensors (GPS, compass, accelerometer etc.). [2] The Wi-Fi+Bluetooth card, [9] and the Modem [10] are on M.2 slots. 2017 NXP arm64 [2] [11] [12] On replaceable m.2 card. Proprietary firmware isolated from CPU with a USB bus (like a USB Wi-Fi ...

7. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headsets are made with either a single-earpiece (mono) or a double-earpiece (mono to both ears or stereo). The microphone arm of headsets is either an external microphone type where the microphone is held in front of the user's mouth, or a voicetube type where the microphone is housed in the earpiece and speech reaches it by means of a hollow tube.