Pratham 3.5MM Bluetooth AUX Audio Stereo HandFree Receiver

Noise Two Wireless On-Ear Headphones with 50 Hours Playtime, Low Latency(up to 40ms), 4 Play Modes, Dual Pairing, BT v5.3 (Calm White) : : Electronics

USB Audio Adapter at Rs 25/piece, Data cable in Delhi

LipiWorld USB 2.0 Mini Microphone Portable Studio Speech Mic Audio Adapter for Laptop PC Skype Microphone - LipiWorld

How to use a Bluetooth speaker as a speaker and a microphone with a Raspberry Pi - Quora

Ant Audio Treble H82 On Ear Bluetooth Headphone with Mic (Black) : : Electronics

JBL TUNE 500BT- Wireless on-ear headphones – AV Shack

Audio Adapter in Delhi, ऑडियो अडैप्टर, दिल्ली, Delhi

How to use a Bluetooth speaker as a speaker and a microphone with a Raspberry Pi - Quora

Yamaha EP-E70A Wireless Noise Cancellation Ear Neckband Earphones (Bla – AV Shack

Yamaha EP-E70A Wireless Noise Cancellation Ear Neckband Earphones (Bla – AV Shack

Denon DSB250BT Envaya - Waterproof Portable Bluetooth® Wireless Speake – AV Shack

USB Audio Adapter at Rs 25/piece, Data cable in Delhi