POFENAL Earpiece Headset Compatible with HYT Hytera PD502 PD562 BD502 TC-508 and TC-580 Walkie Talkie Radio Big PTT Transparent Acoustic Tube : Amazon.ca: Electronics
Hytera Two Way Radios Hyt | Portable Radio Hytera | Radio Hytera Tc 700 - Tc -508 - Aliexpress
Hytera HYT TC-508U(1) Two Way Radio 400-470MHz UHF 16 Channel | eBay
Hytera TC-508 Portable Radio Analog 4W 16CH UHF (400-470) US Dealer 2YR Warranty | eBay