**Product Specifications:**
**Brand:** HIFIMAN
**Model:** HE-R9
**Type:** Closed-back Planar Magnetic Headphones
**Diaphragm:** Topology
**Cable Connection:** Dual-sided 3.5mm TRS cable included, also compatible with single-ended balanced 3.5mm TRRS cable (sold separately)
**Bluetooth Module:** Bluemini R2R for convenient wireless connectivity (sold separately with HE-R9 wireless version)
**Compatibility:** Ensure compatibility before using non-original cables
**Connector:** Dual-sided 3.5mm, left side compatible with 3.5mm Pro interface
**Frequency Response:** 15Hz-35kHz
**Impedance:** 60Ω
**Sensitivity:** 100dB
**Weight:** 328g
**Bluetooth Mode:** Supports various Bluetooth protocols including LDAC, Qualcomm aptX HD, aptX, AAC, SBC
**Wired Mode:** Compatible with traditional wired headphone connection
**Included Accessories:** 3.5mm headphone cable (1.5m) and 6.35mm adapter
**Note:** HE-R9 does not support TS headphone cable connection
For detailed reviews and more information, please refer to the provided images.