If you plan to talk for more than a few seconds at a time, you can set the PTT button (the big circle) to toggle mode so you don’t have to keep your finger on the button while talking. When in toggle mode, you press once to start talking and press once again to resume listening.

You can talk for as long as you want, but someone can interrupt you after 20 seconds. Toggle mode is handy if you plan to conduct meetings or give lectures on a LINX channel. NEXTAV 2-Wireless Button is for iPhone iOS / Samsung Android, and more Smartphones.

Specifications:
Earphone Unit
Speaker Diameter: 15mm
Output Level 94: dB
Rated Input Power: 0.1 W
Output Impedance: 32 Ohm

Microphone Unit
Type of Element: Non-directional Electric Condenser Type
Sensitivity: -38 dB 1V/Pa
Output Impedance: 2000 Ohm