logicool ERGO M575SP Wireless Trackball / Silent I bought this for work, but it doesn't suit my tasks, so I'm selling it. I just bought it online this month (April), and it's in excellent condition, having only been used for about 5 minutes. The battery is the original AA battery that came with it. Connection worked without any problems. Box and all accessories are included. Retail Price: ¥8470 (tax included) Manufacturer: logocool Model Number: ERGO M575SP Connection Method: Bluetooth Low Energy or Logi Bolt receiver