The twowire kit includes an inline PTT with microphone that can clip on to a lapel, as well as a earpiece which can be replaced if required.
Fit for Sepura radios:
STP8000 STP8035 STP8038 STP8040 STP8080
STP9000 STP9035 STP9038 STP9040 STP9080
STP9100 STP9135 STP9138 STP9140 STP9180
STP9200 STP9235 STP9238 STP9240 STP9280
SC20 SC21
Package includes:
1 x Headset or 2 x Headset