Functions: In TX Mode: Transfer your music from a TV, CD player, Ipod, laptop to a Bluetooth headset or stereo (You can connect two devices at the same time); In RX Mode: will transfer the music in your mobile phone or computer to the audio, so that you can enjoy HIFI CD freely The sound quality. Bypass mode: cable connection between TV and Speaker, you no longer need to plug/unplug any wires,easily switch it to other two mode. Utilizing the latest Bluetooth 5.0 technology and dual antennas design, Our Bluetooth transmitter / receiver can achieve a range of up to 262ft(80m) line-of-sight in open air and up to 80-110ft(25-35m) indoors, which ensures a stable connection without losing signal wherever you go in your big house. Support low latency, virtually eliminating visual and auditory delays, you can simultaneously steam audio to 2 Bluetooth headsets, making bluetooth headphones become the best choice for watching TV and movies. Note: In order to achieve this low latency, your receiving setup must support low latency. It has built-in 500mAh battery, this is a UNIQUE feature compared to similar products, you can use it in any situations even there is no AC outlets. It can be fully charged in 2.5 hours but allows for more than 8 hours in TX mode & 10 hours in RX mode of solid use, which is ideal for listening all day or on a long road trip, also you can use it while charging. *Note: This product will automatically enter the dormant and power-saving mode after 6 minutes without connection. Supports remember your setting after power failure. Supports AUX / 2 RCA audio output standards making it compatible with 99% of the TVs on the market(NOTED:Don't support Digital OPTICAL) Feature: Bluetooth version: Bluetooth v5.0 Support protocol: Rx: A2DP AVRCP TX: A2DP Operating frequency band: 2.402ghz-2.480ghz Power level: power level 1 and 2 (class I II) Distortion: 0.1% Support dual stream (TX mode): support (one transmitter is connected to two Bluetooth speakers or headphones at the same time, and one kind of codec is used at the same time, which can support aptx ll at most) Support multipoint (Rx mode): support (connecting two mobile phones) Codec: TX: apt-X, ll, apt-X, SBC, FS; RX:apt-X LL,apt-X,SBC,AAC,FS; Note for using aptx: apt-X ll codec is first supported for single connection (the connected device must also support apt-X LL) Built in battery: 500mah Charging current: About 350mA Charging time: about 2.5 hours Endurance: Rx is more than 10h, TX is about 8h on average Bluetooth distance: < 80m (no occlusion) Charging mode: Micro USB 5V / 0.5A Input / output connection mode: RCA interface, I2S aux interface, support RCA, aux dual output at the same time Compatible: Android, IOS mobile phone and pad, and Bluetooth speaker or headset supporting A2DP protocol Package Included: 1x Bluetooth Adapter 1x 3.5mm Audio Cable 1x USB charging cable 1x RCA Audio Cable 1x User's manua Packing Safely in Retail Box.