This Olympus OEP-5 endoscope unit has been power tested and is being sold for parts only. We don’t have the knowledge to test the item out. That’s why we listed is untested or Parts only ,It is a great opportunity for buyers who are looking for spare parts or those who can repair it. The unit is from the brand Olympus and has a view angle of 5°. The model number is OEP-5 sold as pictured