Hollyland Mars T1000 Intercom System with Case The Hollyland MARS T1000 is a professional wireless intercom system with a working range of 1000ft. Its moving-coil headset effectively reduces noise, providing carrier-grade voice quality. The system also features a 3.5mm earphone port and full duplex wireless communications. The base station of the MARS T1000 comes with 4 beltpacks and supports cascade expansion. It also has an OLED screen, USB firmware upgrade, and supports external tally. Each beltpack has a built-in battery that provides more than 8 hours of battery life and supports charging via USB. With its versatile features, the MARS T1000 can be used in various scenarios such as educational activities, sports events, and live broadcasts.