1Mii B06HD HiFi Bluetooth receiver is hand selected from B06 series production runs which meets higher test specifications, providing an ideal HD and Hi-Res audio listening experience with LDAC, aptX HD codecs and audiophile-grade DAC technologies. A perfect fit to upgrade your old wired stereo. Please note that this product is a Bluetooth receiver, not a Bluetooth transmitter. Only to give Bluetooth capabilities to an existing stereo/powered speaker/PA. Features: 1.This HiFi Bluetooth receiver adds Bluetooth to an older stereo receiver which helps Helps upgrade your home stereo systems. 2.Featuring the premium Qualcomm Bluetooth 5.1 chip, our B06HD receiver provides the superior sound and stable Bluetooth connectivity with aptX HD and aptX Low Latency decoding. 3.This audiophile-grade HiFi Bluetooth receiver can better meet the needs of audio enthusiasts and provide them with higher performance services. 4.Easily connect most wired home stereo systems or AV receivers via the digital (Optical TOSLINK SPDIF Coaxial) or analog (L/R RCA) ports. 5.Plug the B06HD Bluetooth audio receiver into a power source, pair your Bluetooth enabled smartphone and tablet with a convenient, one-push pairing button. 6.Fully charge this receiver for 3.5 hours, it holds 13 hours of playtime. It supports up to 50ft indoors and 80ft outdoors(no obstacles). 7.On the ultra-high-definition OLED display, the song name, sampling rate, battery level, Bluetooth codec, etc. can be clearly displayed. Specification: Product number: 1Mii B06HD Bluetooth version: BT 5.1 Audio input support: Bluetooth Audio output support: Optical / Coaxial / RCA Audio codec support: LDAC / aptX HD / aptX LL / AAC / SBC     Extra audiophile DAC: Yes Battery built-in: Yes Screen display: Yes Volume control: Yes Kind Tips: Please use 5V power supply! DO NOT use unmatched power sources (e.g., 9V /12V), which may lead to equipment failure! And the song title information will NOT be displayed on the B06HD if it is played from a computer. It will only be displayed when played from your cellphone. Bring New Life into Older Stereo Receivers Bluetooth Version 5.1 LDAC High-Resolution Audio Audiophile DAC Stereo Performance Plug n Play, Easy Setup Extended Range & Playtime Volume Control & OLED Display