AirAV / Hollyland Mars T1000-AU Full-duplex Wireless Intercom System - 1 Portable Base Station with 4 Beltpacks. Provides wireless transmission within 320+ metres (1000ft) range and Digital Duplex Bidirectional Communication. The Mars 1000T-AU can be widely used in educational activities, sports event broadcast, live wedding broadcast, live shows. USB Charging and Upgrade Interface.

Base station supports NPF 970 battery and DC power supply. One NPF 970 lasts up to 20 hours. Power the Base station via the included DC power supply, or use up to two NPF style batteries for up to 20hours run time on one battery, and 40 hours runtime on two large-capacity batteries so you don't have to worry about swapping batteries throughout the day!

Fully charged Beltpacks can be used longer than 8 hours. Fully charged Beltpacks have a runtime of over 8 hours and can be charged via a portable power bank for increased runtime, so even if you forget to charge your Beltpacks before the shoot, you can charge on the go. The addition of 2A fast charging means that charging times are reduced with devices which support 2A fast charging.

Beltpacks come with portable size, smaller than iPhone X. The included Beltpacks are compact and remain unobtrusive. They are even smaller than most modern smartphones, so are really easy to slip onto your belt or fit into your pocket.