Ruyage Radio Zello Walkie-Talkie(ZL20)About this item Work with Zello Push to Talk Walkie Talkie App : Our RUYAGE radio works with Zello Push to Talk Walkie Talkie App, allowing for private and group calls. With the ability to create groups and call multiple members simultaneously, communication becomes more efficient than ever before. High battery capacity 6500 mAh: these network radios use a high capacity 6500 mAh battery with a fast USB charging function, can be used for 3 6 days and