RETEVIS TCK01 Kenwood 2 Pin to 3.5mm Female Mobile Phone Audio Earphone Transfer Cable for RT21RT22RT24RT7RT27H777 1. If the transmission power of a walkie-talkie with a power exceeding 2W is too large, the signal is too strong, which will interfere with the PCB board of the patch cord, and the transmission signal cannot be turned off. 2. The patch cord stability test is only applicable to Retevis: RT21, RT22, RT24, RT7, RT27, H777 3. Good quality and long service life 4. Cable length: 145mm 5. Weight: 10 grams Usage and precautions: 1. Insert the plug of the adapter cable into the earphone jack of the walkie-talkie; 2. Insert the earphone into the earphone jack of the adapter cable to turn on the intercom; 3. Press the call button on the headset, the PTT light on the walkie-talkie lights up, and you can use the MIC on the headset to speak; 4. Long press the button on the headset (more than 0.5S), the PTT light on the walkie-talkie turns off, and the walkie-talkie is in standby mode; 5. When using the headset to call, pay attention to turn off the transmitter in time after the call is completed; 6. Avoid using walkie-talkies with high power and too strong signal, so as not to affect the normal use of the product; 7. After turning on the voice control of the walkie-talkie, the voice control sensitivity of the mobile phone headset is extremely low, and the voice control function cannot be used normally.