Лесной телефон

Forest Telephone - group positioning and wireless communication system.
Forest is a phone gadget - in addition to modern smartphones and connected to it via BT. The device itself thus designed as a sealed impact resistant pencil case, about which safety can not think. Your smartphone becomes a functional tourist navigator, group positioning system and a powerful mobile radio. On the screen of the smartphone will display a map of the area marks of all members of the group with the same instruments. With this gadget you will always know where you are, you and your comrades.
The app allows you to use that information to build routes to the band, sets the reference points on the map, and all that is needed for tourist navigation functionality.
Forest also provides voice telephone half-duplex communication between group members. Application installed on your smartphone, encodes it and sends it on to the BT device. Special command in all groups of radio devices are transferred to the voice communication mode and a coded speech is transmitted to the subscriber.