The Shanling BA1 is a Bluetooth receiver with an internal DAC and a high-quality headphone amplifier. Stream your playlists in 24bit/96kHz highres sound quality from your smartphone to this BA1 Bluetooth receiver. The RCA line output let you to connect the BA1 to your Hi-Fi amplifier or you can use the digital Toslink output to connect this BA1 to an external DAC. With the shared USB audio and USB-power input (wall-wart not included), you can easily connect a USB audio source plug-n-play. Like to quietly enjoy your music with a pair of headphones? Just hook-up your sensitive in-ear or over-ear headphones to the Shanling BA1 and listen to your favourite playlists in total silence.