Specifications
Model: F11-2.
Compatibility: Works with iPhone (Lightning), Android (USB-C), and devices with 3.5 mm jack.
Microphone type: Dynamic & Electret Condenser mic in some listings.
Frequency response (audio): ~25 Hz to 25 kHz in some claims.
Signal-to-Noise Ratio (SNR): ≥ 85 dB (according to some sellers)
Noise cancellation: “95-100%” background noise reduction claimed.
Battery / Usage time: 5-6 hours typical according to several listings.
Connectivity: Plug-and-play wireless
Build materials: Metal + ABS plastic noted.
Polar patterns: Some listings mention omnidirectional, cardioid, hypercardioid (and even figure-8) for certain variants.
Wireless transmission range: One listing claims up to about 100 m
Wireless frequency: 2.4 GHz wireless transmission mentioned in one listing.