Granite Sound GS-DC2 Dual-Channel Intercom Beltpack, Tecpro/Clearcom/ASL compatible. In good used condition. GS-DC2 HIGH POWERED DUAL LOOP BELTPACK. Headphone volume and side tone adjustments are also easily accessed while in use. It also incorporates a combined microphone on/call button that allows simultaneous call signal operation and microphone use. Powerful and durable, the GS-DC2 beltpack has 2 circuits for instant dual communication. This beltpack is the perfect choice for live concerts and show professionals, delivering up to 4-times more power to the headphones than conventional beltpacks. Separate volume control – Combined microphone on/call button – 6-pin XLR connector – 2 circuits for simultaneous dual-channel communication.