The Razer Basilisk X Hyperspeed is a gaming mouse with Bluetooth connectivity and an ultra-long battery life. - Model Name: Basilisk X Hyperspeed - Connectivity: Bluetooth - Function: Gaming Mouse - Sensor: Razer Advanced Optical Sensor - Buttons: 8 Programmable Buttons - Battery Life: Ultra-Long Battery Life - Storage: On-board Driver Storage - Wireless Technology: Razer Hyperspeed Wireless Technology Thank you for viewing. This is a used item, and its operation has been confirmed. I tested it with a separate AA battery I had at home, and it worked without any problems. (One AA battery is included in the box.) Since the operation has been confirmed, returns are not accepted. Please understand this before purchasing. #RAZER #GamingMouse #OperationConfirmed #NoReturns