Retevis TCK01 2Pin to 3.5mm Female Phone Audio Earpiece Transfer Cable For Retevis RT21 RT22 RT24 RT7 RT27 H777 Walkie Talkie
https://www.vogueparade.com/shopping/EN/200380144/1/32843835877/retevis-tck01-2pin-to-35mm-female-phone-audio-earpiece-transfer-cable-for-retevis-rt21-rt22-rt24-rt7-rt27-h777-walkie-talkie//