The radio:
https://amzn.to/3lmzEGg
Brushbeater discusses the DM-1701 on his blog:
https://brushbeater.org/2020/11/30/a-quick-start-guide-to-the-baofeng-dm-1701/
Best bang for the buck: Nagoya NA-771 antenna
Amazon.com: Authentic Genuine Nagoya NA-771 15.6-Inch Whip VHF/UHF (144/430Mhz) Antenna SMA-Female for BTECH and BaoFeng Radios: Cell Phones & Accessories