How does a Bluetooth speakerphone enable hands-free calling?

@rubie 

A Bluetooth speakerphone enables hands-free calling by connecting wirelessly to a compatible device, such as a smartphone, using Bluetooth technology. Once connected, the speakerphone acts as a speaker, microphone, and remote control for the device, allowing users to make and receive phone calls without physically holding the phone.

Here's a step-by-step explanation of how it works:

1. Pairing: The Bluetooth speakerphone needs to be paired or connected to the user's device initially. This is usually done by pressing a pairing button on the speakerphone and searching for it in the Bluetooth settings of the device.
2. Connection: Once paired, the Bluetooth speakerphone establishes a wireless connection with the device. This connection allows for audio transmission between the phone and the speakerphone.
3. Hands-free calling: When a call is received or initiated on the paired device, the Bluetooth speakerphone automatically redirects the call's audio to its built-in speaker. The speakerphone also features a built-in microphone that picks up the user's voice during calls.
4. Microphone and speaker function: The built-in microphone of the speakerphone captures the user's voice and transmits it wirelessly to the smartphone. The smartphone processes this audio and sends it to the recipient of the call.
5. Remote control functions: In addition to hands-free calling, Bluetooth speakerphones often offer remote control functionalities. This can include options like call answering/rejecting, volume control, call muting, redialing the last number, or accessing voice assistants like Siri or Google Assistant.

By using a Bluetooth speakerphone, individuals can conveniently make and receive calls without holding the phone or being restricted by wires. It enhances safety while driving, facilitates multitasking, and provides a more comfortable calling experience in various situations.