TOPPING BC3 is a compact Bluetooth decoder that supports Bluetooth 5.0 and LDAC transmission, while outputting digital optical fiber, headphone jack and Line Out interface, and built-in battery. It can be used as a complement to the Bluetooth input of the decoder, can be used as a portable Bluetooth amp, and can be used as the Bluetooth input of a sound system. The TOPPING BC3 is small and exquisite, but it meets your needs and gives you a different music enjoyment. Features : - Bluetooth 5.0 aptX HD amp; LDAC - ES9018Q2C DAC Chip - S/PDIF Optical Output - Built In Battery Product Specification : Type : Bluetooth Receiver DAC Bluetooth Chip : CSR8675 Bluetooth Norm : 5.0 Bluetooth Protocols : SBC / AAC / apt-X / aptX - LL / apt-X HD / LDAC DAC Chip : ES9018Q2C Inputs : Bluetooth Outputs : Headphone Out - jack 3.5mm, Line Out / mini-toslink - jack 3.5mm Output level : Headphone Out : 2Vrms @0dBFs, Line Out: 2Vrms @0dBFs Volume : Volume control 32-steps Receiving distance : 10m max Battery : 800mAh Batterie use : Headphone Out 32 : ~12 hours, Mini-toslink Out: ~11 hours , Standby: ~25 days Charge time : 3 hours