Quantity   Component name
1 × Handy-Talkie (https://www.amazon.com/dp/B08J48STLB or similar) ($25) Inexpensive https://www.amazon.com/dp/B074XPB313 or similar
1 × ESP32 based Audio interface (https://www.amazon.com/dp/B0B5XKG5NK or other vendor) Audio interface to the Radio.
1 × Audio cable 3.5mm to 3.5 mm RTS (https://www.amazon.com/dp/B017PT8XWU or similar) Audio cable for radio speaker out to Boondock Echo input
1 × Audio cable 3.5mm to 2.5 mm RTS (https://www.amazon.com/dp/B01MDVLLDE or similar) Audio cable for audio level adjuster to Handy-Talkie microphone input.
1 × Audio Level Adjuster 3.5 mm male to 3.5 mm male (https://www.amazon.com/dp/B08X6HY268 or similar) To reduce clipping
1 × [Optional] 8 Ohm speaker with JST-PH2.54mm interface (https://www.amazon.com/gp/product/B07FTB281F or similar) For audio notifications
1 × [Optional] 1-3 cell 3.7V battery with JST-PH2.54mm Interface (https://www.amazon.com/gp/product/B095DQJ69Q/ or similar) To add battery backup
1 × [Optional] https://www.amazon.com/B07NWD5NTN/ For making cable interfaces
1 × [Optional] https://www.amazon.com/dp/B076JFFDWN/ For making cable interfaces