Steren RAD-510 Manual De Instrucciones página 33

3.- To start communicating, just press and hold the
PTT button, the LED indicator lights up red. While
speaking, keep the unit in an upright position and at a
distance of 2.5 cm from the mouth.
When you want to finish the conversation, release the
button PTT
4.- When receiving, the LED indicator lights up green.
5.- Adjust the volume level according to your needs.
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