The GEN II VPU when deployed with the FM53, FM54 or M53A1 Air Purifying Respirators; the most tactically advanced masks in the world, provides the operator with the best-in-class respiratory communications platform. This item is new. Comes with what you see in the post. Unit was never used. Originally developed for Special Operations. Unit comes with an on/off switch. Runs on CR123 battery lithium, last for up to 50 plus hours. Again, listing includes what is pictured. If there any significant damage to packing, please let us know so we can address the issue as needed. We strive for 5-star service by having a happy customer. If you have any concerns let us know first so we can fix it. We strive to earn 100 percent’5 Star’ scores from you. Our future success depends on it! Feedback is extremely important as we build our business. If given a fair opportunity, we will do our best to satisfy you, our customer.