Dual ES9219 HiFi DAC 2.5 mm Balanced (4V RMS) 3.5 mm Unbalanced (2V RMS) Qualcomm QCC5124 Bluetooth Chipset HFP / HSP / A2DP / AVRCP LDAC / aptX Adaptive / aptX HD / AACBluetooth and USB DAC 96KHz/24bit with embedded double-precision equalizer500mA Li-Po Battery / 6~20 hours streamingPlastic Body (Black) with anti-scratch UV Coating / Aluminium Clip (Dark Gray) / 52.8 (H) x 26.7 (W) x 15.6 (D) mm (including Clip) / 25g