Overview - Bluetooth 4.0 – Applies the latest Bluetooth 4.0 with low energy (BLE) technology and it is backward compatible with Bluetooth V3.0/2.1/2.0/1.1 - Driver Free – Plug and Play for Win 8, Win 8.1, and Win 10 - Nano-Sized – Ultra-small for convenient portability with reliable high performance - Supported Operating System – Supports Windows 10/8.1/8/7/XP Specifications 1. HARDWARE FEATURES - Standards and Protocols >> Bluetooth 4.0 - Interface >> USB 2.0 - Dimensions ( W x D x H ) >> 0.58 × 0.27 × 0.74 in (14.8 × 6.8 × 18.9 mm) 2. OTHERS - Certification >> FCC, CE, RoHS - Package Contents >> Bluetooth 4.0 Nano USB Adapter UB400 Quick Installation Guide - System Requirements >> Windows 10/8.1/8/7/XP - Environment Operating Temperature: 0℃~40℃ (32℉ ~104℉) Storage Temperature: -40℃~70℃ (-40℉ ~158℉) Operating Humidity: 10%~90% non-condensing Storage Humidity: 5%~90% non-condensing