Bluetooth V5.0
Chipset CSR BC8670
Frequency 2.402GHz ~ 2.480GHz
Receiver Working Time (AUX) 15 hours
Transmitter Working Time (AUX) 15 hours
Receiver Working Time (SPDIF) 12 hours
Transmitter Working Time (SPDIF) 12 hours
Bluetooth Profile RX: A2DP AVRCP
TX: A2DP
CODEC Priority APT-X, Second SBC, Third APTX-LL, Fourth Fast stream; RX: SBC
Charging Time About 2 hours
Charging Supply USB powered
Dimension 2.36 x 2.36 x 0.72" (60 x 60 x 18.4mm)
Net Weight Approx: 1.36oz (38.6g)
Package Includes 1 x BLUECAST-2 Audio Adapter
1 x 3.5mm Male to Male Cable
1 x Digital Optical TOSLINK Cable 
1 x USB Charging Cable 
1 x User Guide