NRG Research Belt only, See description.

These are 3" wide belts, with Velcro on one side and an NRG battery charger.  The Charger has a 4 pin Female XLR  that attaches to a 12V DC supply, and a pair of 3 pin Male XLRs outputs, a switch and LED charge indicators.  These were working belts, and the batteries have been removed due to age.  

Please Note that the photos display battery pack and charging cable that ARE NOT INCLUDED.

This is from the NRG Brochure:

This 4.9 lb. wonder is our most popular power product and is relied on daily by thousands of videographers the world over. From the serious "prosumer" to the full-time working professional, the Power-Pro+ is the basis of a sophisticated and affordable power system that can be expanded as a user's needs demand. The Power-Pro+ belt is a unique combination of power and comfort. 

It features:

• interchangeable high-capacity, memory-free, quick-charge-capable sintered Ni-Cad power packs
• Power chassis with dual inputs
• Battery pack change without shutdown
• Dual power outputs for powering two devices simultaneously
• 5-stage multi-color "Fuel Gauge" indicator
• Auto-reset overload protection for connected equipment.