The ESS's high-quality DAC ES9018K2M applied Features ESS ES9018K2M DAC which is a high performance 32bit / 384kHz PCM data, 2CH audio D/A converter targeted for audiophile grade portable applications, a high level that will satisfy the most demanding audio enthusiasts. 2.1V RMS MAX RCA output level. World’s top high-quality Bluetooth codecs applied We are proud of being a leader of Hi-Fi receiver market by applying all the world’s hottest high-quality codecs to support our audiophiles. What's in the Box BluDento B2 x 1USB-C power cable x 1RCA audio cable x1Optical audio cable x 1RCA-3.5mm adapter x 1Bluetooth Antenna x 1 Advanced Qualcomm Bluetooth Chip It is a multi-functional Bluetooth chip supporting for aptX, 24-bit audio, aptX Low Latency, aptX HD, active noise cancellation and Qualcomm True Wireless stereo for high resolution audio performance that is comparable to wired. Turns any Old Speakers into a Bluetooth Sound System You can enjoy high-quality Bluetooth audio from smartphone anywhere when you connect BluDento B2 to hi-fi receivers, amplifiers. Flexible Output Connectivity Supports both analog: L/R RCA / 3.5mm AUX and digital: Optical TOSLINK + S/PDIF Coaxial outputs, provides wide compatibility with your existing stereo equipment. Why BluDento B2 Lossless Bluetooth Receiver ? We have an on-board ESS DAC ES9018K2M for analog output, others do not.BluDento automatically enters pairing mode when it is powered on and does not require manual operation.Auto Reconnect: Turn on your phone's Bluetooth first, then launch BluDento.BluDento does not require a driver and does not require an APP, while WiFi audio receivers require a driver and require an APP.Compatible with iOS, Android, macOS, and Windows devices.Works seamlessly with all your APPs and music. Spotify, Tidal, Qobuz, Pandora - all streaming APPs for instant playback. Q: How to enter pairing mode? A: BluDento automatically enters pairing mode( the indicator light flashes blue ) when it is powered on and does not require manual operation. Q: Why do I have sound problem when connecting BluDento B2 by optical/coaxial output? A: Below are some possible causes for this issue: The connected home theater system, audio receiver or sound bar is not set to properly decode the digital signal.The connected home theater system, audio receiver or sound bar DOES NOT support 96kHz / 48kHz sample rate, switch the Bluetooth source device's sample rate to 48kHz / 44.1kHz, this usually solves your problem.The optical cable is not securely connected.The optical cable may be faulty. Q: Can I connect this device to Amazon echo dot ? A: Yes. make sure to connect BluDento with your stereo via an audio cable, NOT with the echo dot; enter the Alexa app, go to Settings -> Devices/Echo -> Bluetooth -> Pair a New Device -> B2. Q: Does this item make an audible sound when it connects to a device? A: No, it doesn't make any sound when connected/disconnected to a device. You can see it on the dislay screen when the device is successfully connected. Notes: Both model BLT-HD & B2 support LDAC codec.ONLY B2 has OLED display and control button.ONLY B1 supports NFC quick pairing, ONLY B1 has built-in antenna.Please make sure to use a power adapter for power supply, this will eliminate ground loop noise. Please use a 5V power supply! DO NOT use a mismatched power supply (e.g. 9V / 12V) as this may cause the unit to malfunction.The iPhone only supports AAC. For aptX HD, you can go to Developer Options( Android ONLY ) and select it. BluDento BLT-2 BluDento BLT-HD BluDento B1 BluDento B2 Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.3 out of 5 stars 549 4.5 out of 5 stars 954 4.5 out of 5 stars 129 4.7 out of 5 stars 59 Price $79.00$79.00 $99.00$99.00 $39.99$39.99 $119.00$119.00 Bluetooth Version 5.1 5.1 5.1 5.1 Built-In DAC TI PCM5102A TI PCM5102A TI PCM5102A ESS ES9018K2M Bluetooth Codecs aptX HD, aptX Low Latency, aptX, AAC, SBC LDAC, aptX HD, aptX Low Latency, aptX, AAC, SBC aptX HD, aptX Low Latency, aptX, AAC, SBC LDAC, aptX HD, aptX Low Latency, aptX, AAC, SBC Audio Output Ports OPTICAL + COAXIAL + RCA OPTICAL + COAXIAL + RCA OPTICAL + COAXIAL + RCA OPTICAL + COAXIAL + RCA Audio Input Bluetooth ONLY Bluetooth ONLY Bluetooth ONLY Bluetooth ONLY Multi-function Button N/A N/A N/A ✓ Power Supply Port micro USB micro USB micro USB USB-C OLED Display N/A N/A N/A ✓ NFC Pairing N/A N/A ✓ N/A External Antenna ✓ ✓ N/A ✓