Full details - https://www.ketonix.com/component/virtuemart/ketonix-products
-2019-no-batteries/2019-ketonix-bluetooth-detail 

I have only used a couple of times and it works perfectly with phone app or on PC/Mac.

Plugs in for power but communicates with app via Bluetooth.

Selling as Keto just wasn't for me.

New these cost US$ 219 plus shipping

Looking for $200 with free shipping.