Specification:
Type: Bluetooth Adapter
Model: BTD 401
Weight: Approx. 20g
Size: Approx. 2.2 * 1.5cm / 0.9 *0.6in
For CSR8510A10 original chip: Yes
Bluetooth standard: V4.0 + EDR dual mode
Support Bluetooth CLASS 2: Yes
USB interface: USB2.0 standard, downward compatible with 2.0/3.0 standard
Operating frequency band: 2.4GHz 2.483GHz, using FHSS (frequency hopping spread spectrum) technology
Operating range in open space: Approximately 20 50 meters
Intuitive software operation interface, no complicated settings: Yes
Applicable to operating systems: For Windows/ME/2000/XP/2003/VISTA/WIN7/8/8.1
For Windows XP SP2/VISTA/WIN7/8/8.1, it is inevitable to drive, easy to carry! (For WIN8/8.1, it can be connected directly to the Bluetooth headphone speaker, other drivers need to be installed)

Package list:
1 * Bluetooth Adapter (NO Drive CD)

Note:
1. Please note that the package ONLY include a Bluetooth adapter.
2. Please allow slight error due to manual measurement. Thanks for your kind understanding.