FiiO JD10 in-ear monitors with a 10 mm polymer diaphragm. Detachable cable on two-pin connectors, in-line remote and microphone, two finishes.

Each earpiece has a 10 millimetre polymer composite diaphragm. A dual-cavity architecture works the bass, and the Japanese CCAW voice coil measures 0.033 millimetres. An N52 neodymium magnet drives its movement.
Impedance settles at 32 ohms at 1 kHz for a sensitivity of 105 dB per milliwatt. The passband runs from 20 Hz to 40 kHz. Each earpiece weighs 3.7 grams, which makes it easy to forget after a few minutes.
The oxygen-free copper cable detaches on 0.78 millimetre two-pin connectors and ends in a 3.5 mm plug. It measures about 1.2 metres. An in-line remote with microphone handles volume, playback and calls.
The JD10 comes in two finishes: transparent or transparent black. The box holds three pairs of tips, with the medium size fitted from the factory. The earphones are Hi-Res Audio certified.
Data sheet
Specific References
The FiiO JM21 is an ultra-slim Android audiophile digital audio player (DAP) featuring dual CS43198 DACs, 700 mW of power, and Wi-Fi.
MMCX earphone cable with 360 wires of gold, silver and copper, about 1.2 m long. Its 3.5 mm, 2.5 mm and 4.4 mm plugs are interchangeable.
FiiO LS-3.5B cable for earphones with 0.78 mm 2-pin connectors, with a microphone and in-line control button. Its 3.5 mm jack plug is L-shaped.
Balanced earphone cable in silver-plated copper, with a 4.4 mm plug and 0.78 mm 2-pin connectors. It has 280 strands and was designed for the FiiO FD11 and FH11 earphones.