Features: brand new and high quality 3 IN 1 -TX RX BYPASS MODES: TX Mode: connect Wireless transmitter to audio output devices ;RX Mode: make your old home stereo system Wireless-enable and rejuvenate again. Bypass Mode (wired):you no longer need to plug/unplug any wires, easily switch it to other two modes. Wireless BT 5.0 HI-FI Aptx HD-/LL:Features the highest version Wireless BT V5.0 and the high-end CSR8675 chip to provide the best transmission efficiency, stability and ultra-low power consumption. Support AptX HD- and AptX Low Latency. DUAL ANTENNAS 265ft LONG-RANGE: Actually tested over a range of 265ft(80m) in open air and over 100ft(30m)indoors without any stuck and delay. Long transmission range, super stable and powerful. 15-20 HOURS LONG STANDBY for TIME& NFC:Built-in 1000MAH powerful battery, it will offer 15 hours in TX mode 20 hours in RX mode of solid use on one charge. Supports both RCA/3.5mm aux audio connectivity digital/optical audio input and output,. DUAL STREAM & MULTI-POINT CONNECTION:Support Dual Stream in TX Mode and Multi-Point Connection in RX. Pair with two Wireless headphones/speakers to double the fun. Satisfaction. Specifications: Type:Bluetooth5.0-compatible Audio Receiver Transmitter Size: approx12.5x8.6x2.3cm/4.92x3.38x0.9in Color: Black Material: ABS Audio Input/Output: Optical;3.5mm Aux/RCA Audio CODEC:aptX HD-;aptX Low Latency;aptX ;SBC Range:80M/265ft Battery Capacity:1000mAh Charging Time:about 4.5Hrs Input Volt: for DC 5V Type: Bluetooth-compatible Dongle / Aux Usb Adapter / Bluetooth-compatible Computer Adapter Package Includes: 1 x BT5. 0 Audio Transmitter Receiver 1 x 3.5mm Aux Audio Cable 1 x Optical cable 1 x USB Cable 1 x User Manual note: The pairing for time varies on different model of . But they can surely pair successfully with our devices. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.