The 3.5mm base pin has no PTT pass through, your PTT won't work if using an external PTT switch. Needs to press the PTT button of the radio to send transmissions.
2 prong K1 connector with universal standard 3.5mm female port, compatible with most brands of phone audio headsets which has a 3.5mm jack.
Switch walkie talkie headset to mobie phones.
Tpu cable, cable length is about 4.3inches
Package contains: 1 adapter cable
Description
Renastar Walkie Talkie Adapter, K1 Male to 3.5mm Female, for Baofeng Retevis uv5r K1 Plug Radios to Cellphone