DescriptionThissignal 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.-RX mode: Pairing name: ZF-169, find it in thesettings of the phone to pair. The blue light flashes during the pairing process, and the blue light stops flashing after the pairing is successful. Connect the product to the audio device with a 3.5 audio cable.- TX mode: TX mode will automatically search for otherreceiving devices (such asheadset,speaker,receiver, etc.), the red light flashes during pairing, and the red light stops flashing after pairing succeeds. Connect the product to a device such as a TV with a 3.5 audio cable/RCA audio cable.-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: Black.- Size: 3.1 x 1.3 x 0.8 cm.- Material: Metal+Plastic+Electronic Component.-Technologies: BT5.0, A2DP, AVRCP (receiver mode only)- Operation Range: Up to 10m / 33ft (without any blocking objects)- Pairing name(Receiver mode ):ZF-169- Indicator light: Transmitter mode: red LED light is onReceiver mode: blue LED light is on