Extreme small size design make you use/storage it more conviently. This signal transmitter can be used for almost of audio output digital products. You just need to link to the audio input port. Included computers, TVs, , and all other products that don't have transmission capabilities. With headset or stereo, 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. audio output devices such as TV, , CD player, PC, MP3 / MP4, and transfer audio to headsets, speakers and other receivers. - Transmitter mode:wirelessly streams audio from your non- TV, home stereo system, or CD player to your headphones or speakers. - Receiver mode: wirelessly streams audio from your -enabled phone, tablet, or computer to your stereo, speakers, or headphones. - Caution: If the device has been in a mode for a long time, it needs to be to to another mode. If the device has just switched mode, you want to immediately 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 device together to build an , allow all connected device visit (Caution: Need at least 1 connected device). - Wide transmittion distance: 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 +EDR - /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 (frequency hopping spread ) technology - Operating range is about 20 meters - Operating system for 98SE/ME/2000/XP/2003/VISTA or 10.2.6 or higher - Driver-free use under XP /VISTA - Data transfer rate up to 3Mbps - Sensitivity: - Security: built-in password and user authorization - Power: USB interface directly powered - PC/ : wireless dial-up access (requires mobile phone and other devices) - PC: wireless fax (computer needs to have fax software installed) - PC/ : wireless file transfer - PC/ : wireless data synchronization - PC: Support for virtual serial port - PC: Support wireless printing - PC: Support headset - PC/ : Supports human interface ( mouse and keyboard) - Applicable devices: All devices that support or Package list: 1 x transmitter