I received this as a gift from an electronics store, but I already have one, so I'm selling it. Bluetooth Mouse Even if your computer doesn't have Bluetooth, you can use it as a Bluetooth mouse by purchasing an adapter like the one in the 6th photo. Here's the product description: Bluetooth Optical Mouse Black Approximately 500-hour battery life - Brand: ELECOM - Connectivity: Bluetooth - Color: Black - Size: Approximately 52.7mm x 92.1mm x 36.4mm - Number of buttons: 3 - Battery life: Approximately 500 hours - Sensor type: Optical - Compatible OS: Windows, Mac, iOS, Android Thank you for looking.