The Al-Ghazaleh optical device is brand new, only tested. The device price is around 1000. My final offer is 650 for the new device. It has many features, a special program for the device that connects via Bluetooth, it's excellent and calculates heart rate, focuses on leg exercises like a bicycle, and focuses on exercising the whole body at the same time. The device is known. From Sky Land, it's very, very excellent.