Model Number: CT2303-P1 Brand Name: Namcks Key Specifications/Special Features: 1.External PTT provides: channel regulation, channel storage, frequency regulation, transmitting and other function. Improving vehicle users’operating efficiency. More convenient and safe.2.External microphone and finger PTT can fit into the right place according to usage.3.It issuitable for transport, taxi, ham and other mobile radio userAlternate plug according to your enquiry