1000ft full-duplex Wireless intercom system stable and reliable wireless communication. Up to 10 Channels Communication. Mini Base Station Suitable for Various Placement. Power Supply:Sony NP-F Series Battery or DC12V. USB Charging and Upgrade Interface Get Ready for the Latest Firmware.OLED Screen, Display the Status of Each Beltpack in Real Time. OLED Screen of Beltpack, Get Details Easily. Built-in Lithium Battery More Than 8 Hours Battery Life. This item is in the category "Consumer Electronics\TV, Video & Home Audio\TV, Video & Audio Accessories\Audio/Video Transmitters". The seller is "easy-photovideo" and is located in this country: CN. This item can be shipped worldwide.