Kouwell USB 2.0 To Bluetooth Adapter Pack Size: 1 pack Minimum Bulk Purchase: 1 x 1 pack (1 total) Features: Standard: Bluetooth v1.1 Frequency Band: 2.400~2.4835GHz Unlicensed ISM Band Power Class: Bluetooth Class II operation Transmission Distance: Up to 40 meters (Open Space) Interface: USB UHCI/OHCI Spec. 1.1 compliant Operating Channel: 79 channels of 1MHz BW Data Rate: Supports data rate up to 723 kbps Dimension: 51.3 17 10 mm (L x W x H) Modulation type: GFSK Operating Power: 5V DC System Requirements: IBM compatible PC/Notebook with USB interface Windows 98SE/ME/2000/XP MAC OS 10.2 or later version (Limited Bluetooth profiles supporte Weight: 0.50 Kg