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For example, when you use a mobile phone with a Bluetooth headset, the phone uses SDP to determine which Bluetooth profiles the headset can use (Headset Profile, Hands Free Profile (HFP), Advanced Audio Distribution Profile (A2DP) etc.) and the protocol multiplexer settings needed for the phone to connect to the headset using each of them.
This is the most commonly used profile, providing support for the popular Bluetooth headsets to be used with mobile phones and gaming consoles. It relies on SCO audio encoded in 64 kbit/s CVSD or PCM and a subset of AT commands from GSM 07.07 for minimal controls including the ability to ring, answer a call, hang up and adjust the volume.
A very common application is a hands-free Bluetooth earpiece for a phone which may be in a user's pocket. There are two types of Bluetooth headsets. Headsets using Bluetooth v1.0 or v1.1 generally consist of a single monaural earpiece, which can only access Bluetooth's headset/handsfree profile.
G432 Surround Gaming Headset 2019: 7.1: DTS:X 2.0 Only* No — USB and Analog: Yes: Yes: Has volume on the back of the left earcup. Mic up to mute. G35 Surround Gaming Headset 2009: 7.1: Dolby Only: No — USB: Yes: Yes: Has volume, muting and user-programmable G-keys on the side of the earcup. G930 Wireless Gaming Headset 2011: 7.1: Dolby Only ...
Headphones grew out of the need to free up a person's hands when operating a telephone. [7] By the 1880s, soon after the invention of the telephone, telephone switchboard operators began to use head apparatuses to mount the telephone receiver. [8] The receiver was mounted on the head by a clamp which held it next to the ear. [9]
Earbuds size 21.6 x 19.9 x 18.7 mm Earbuds weight 5.5g Case size 50.2 x 50.4 x 27.7 mm Case weight 43.3g Bluetooth version Bluetooth 5.3 Sensors Accelerometer, Gyro sensor, Hall sensor, Proximity sensor, Touch sensor, Voice Pickup Unit Battery Earbuds: 58 mAh Case: 500 mAh Charging USB-C and Qi wireless charging