タイトルまたは説明

The IP PTT device is an Android based mobile handset that can use features such as Walkie-tolkie in 3G, LTE and WiFi network. Unlike the ordinary mobile phones, everyone can make a call by pressing a PTT key without waiting.

1) Key feature
    - Private walkie-tolkie(1:1 call)
    - Group walkie-tolkie(1:N call)
    - Emergency walkie-tolkie
    - Normal phone call
    - Messageing service(SMS, MMS)

2) Key benefits
    - Reduce cost : we can reduce cost by using group walkie-tolkie.
    - Prompt communication : we can communicate with many people at the same time.