EarStudio ES100 MK2

DAC: Asahi Kasei AK 4375a × 2  Input: Bluetooth A2DP or USB DAC  USB DAC: USB Audio Class 1.0 (Up to 48 kHz / 16 bit)  Output:  3.5 mm (Unbalanced) /  2.5 mm (Balanced / 4-Pin)  Output Level:  3.2 Vpp (Unbalanced) /  6.4 Vpp (Blanced)  Output Impedance: 1 Ω (Unbalanced / Blanced)  SNR:  109 dB (Unbalanced) /  110 dB (Blanced)  Bluetooth Version: 5.0  Profile: HFP / HSP / A2DP / AVRCP / LDAC  Corresponding Codec: aptX / aptX HD / AAC / SBC  Maximum Communication Distance: about 10 m  Battery Capacity: 350 mAh (Lithium Polymer)  Continuous Playing Time: about 14 hours  Body Size: (W) 30 × (H) 53 × (W) 15 mm  Body Weight: about 20 g