DescriptionExtreme small size design make you use/storage it more conviently. Thissignal transmitter can be used for almost all kind of audio output digital products. You just need to link to the audio input port. Included computers, TVs, set-top boxes, and all other products that don't havetransmission capabilities. Withheadset orstereo, you can easily enjoy music and TV shows without affecting others and ensuring privacy.Feature- Light weight:Small size , but has got powerful wireless audio streaming capabilities. this transmitter and receiver into your backpack or laptop bag and take it on-the-go without the slightest effort.- Connect audio output devices such as TV, iPod, CD player, PC, MP3 / MP4, and transfer audio toheadsets,speakers and otherreceivers.-Transmitter mode:wirelessly streams audio from your non- TV, home stereo system, or CD player to yourheadphones or speakers.- Receiver mode: wirelessly streams audio from your -enabled phone, tablet, or computer to your wired stereo, speakers, or headphones.- Caution: If the device has been in a mode for a long time, it needs to be re-energized twice to switch to another mode. If the device has just switched mode, you want to immediately switch to another mode, you only need to re-energize once.- Multi function: Also it can be use as an simple wireless connector, allow you connect max 8 device together to build an simpleLAN, allow all connected device visit internet(Caution: Need at least 1 Internet connected device).- Wide transmittion distance: Max 10 Meters wireless connect distance, make you use it more easily and freely.-Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Specification-Color: As Shown.- Size: 2.2 x 1.8 x 0.7 cm.- Material: Metal+Plastic+Electronic Component.- standard V2.0+EDR- CLASS 1/2/3 support-USB interface: USB2.0 standard, backward compatible with 1.0/1.1 standard-Operating frequency band between 2.4GHz and 2.483GHz, using FHSS (frequency hopping spread spectrum) technology-Operating range is about 20 meters-Operating system for Windows 98SE/ME/2000/XP/2003/VISTA or OS X 10.2.6 or higher-Driver-free use under Windows XP SP2/VISTA-Data transfer rate up to 3Mbps-Sensitivity: -Security: built-in password and user authorization-Power: USB interface directly powered-PC/Mac:wireless dial-up Internet access (requiresmobile phone and other devices)-PC:wireless fax (computer needs to have fax software installed)-PC/Mac:wireless file transfer-PC/Mac:wireless data synchronization-PC: Support forvirtual serial port-PC: Supportwireless printing-PC: Supportheadset-PC/Mac: Supportshuman interface ( mouse andkeyboard)-Applicable devices: All devices that supportv1.1 or v1.2