DD ddHiFi TC44Pro E2 USB DAC to 4.4mm Balanced Adapter Version:Lightning The wood headphone housing is

The wood headphone housing is made by five axis CNC carving

Gain: High/Low (Software switching)

Power Power Type: built-in rechargeable lithium-ion battery

as per your requirement

FI-E1DPLBL(BLACK)

DD ddHiFi TC44Pro E2 USB DAC to 4.4mm Balanced Adapter Version:Lightning The wood headphone housing is"Eye", second generation The eye is ddHiFi's wired variant of USB DAC Amplifier dongles. The design has only one interface, and the shape is centered like an eye. The wires of the second generation Eye sport all pure silver shielded conductors, similar to the entire 07 series of pure silver conductors used on TC44Pro E2, which is solid and durable while ensuring resolution and detailed performance. Tuning, not just high power TC44Pro E2 uses two