H4 Dual PTT, Dual Audio Talk Speaker Mic
Dual link Push-To-Talk control.
Dual audio connection with two Bluetooth devices at the same time, such as cellphone, two-way radio
Dual talk, merged listen, to keep the talk between the two devices confidential to each other
Outstanding DSP noise cancellation and anti-howling
Support wireless charging(Optional)
Support PTT for most Poc apps
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