This is a set of a wireless mouse and adapter. Usage period: Mouse: About half a year Adapter: About 1 year The mouse has some minor scratches. I don't think they are very noticeable, but please consider this a used item. I will include one AA battery. Both have been cleaned and their operation has been confirmed. BUFFALO Bluetooth 5.0 compatible wireless mouse, uses AA batteries. [Mouse] - Brand: BUFFALO BSMBB330NBK - Connection method: Bluetooth - Battery type: AA battery - Bluetooth version: 5.0 [Adapter] TP-Link Bluetooth USB Bluetooth 5.4 compatible [Update required] Adapter for PC/Tablet Bluetooth adapter [Features] Bluetooth 5.4 compatible Bluetooth adapter. Compatible with Bluetooth V4.0/3.0/2.1/2.0/1.1. [This product is an English package version] (To use Bluetooth 5.4, please download the latest driver from the TP-Link website.) [Supported OS] Compatible with Windows 11/10/8.1/7. [Small size for easy portability] 14.8 × 6.8 × 18.9 mm [Nano size] High performance, yet achieves an ultra-compact size for easy portability. ※: UB500 is not compatible with MAC, Linux, TV, and Windows 8. UB500 is for PC only, so it is possible to connect Xbox/PS4/PS5 controllers to a PC via Bluetooth, but it cannot be used by directly plugging it into the Xbox/PS4/PS5 console. Also, multiple UB500s cannot be paired with each other. #Wireless #Bluetooth #Mouse #Adapter #BUFFALO #TP-Link