Logitech ERGO M575SP Wireless Trackball / Silent I purchased this for work, but it didn't suit me, so I'm selling it. I bought it online in April and it's a beautiful item, only used once. The battery is the original AA battery that came with it. Connection worked without any problems. Box, accessories, everything is included. Retail Price: ¥8470 (tax included) Manufacturer: Logitech Model Number: ERGO M575SP Connection Method: Bluetooth Low Energy or Logi Bolt receiver