The SX-923 is a sleek mono wireless Bluetooth headset, made of the highest quality while remaining light in terms of weight They are designed to be comfortable and allow you to multitask by freeing you of restrictions other Bluetooth headsets won't Excellent sound quality and freedom of movement Easy to use voice volume controls Features: Brand New High Quality Computer Bluetooth HeadsetHands-Free Conversation Allows You To Communicate While Performing Other ActivitiesAdjustable Headset For Any SizeConvenient Easy To Reach ControlsYou Can Rotate The Mic For Any PreferenceComfortable To WearCan Be Used Either Home Or OfficeUniversal CompatibilitySimple To Install With Software Provided Specifications:Connection Type: Bluetooth Wireless Compliant with: Bluetooth V20 with EDR, V12 and V11 Model: SX-923 Talk Time: Up to 8 hours Charge Time: 25 to 3 hours Standby Time: Up to 270 hours Operating Distance: 10m (33 feet) Compatible: Laptop, Windows, iMac, Macbook,Smartphone, MSN, PSP, PS3 Frequency Range: 24026Ghz to 2480Ghz Dimensions: 155mm x 140mm x 50mm Color: BlackBox Contents: Computer Bluetooth Wireless Hands-Free HeadsetUSB Charger ConnectorUSB DongleCD Software InstallationUser Manual GuideAdvisory:For Windows Vista 7 Systems, Please Do Not Use Software W/ Package Use As Plug PlayFor Windows XP Systems, Software Can Be Used