• 【Versatile 4-Channel System】The BY-V4U wireless microphone system offers professional-grade audio freedom with four mono channel transmissions, perfect for seamless video recording and production in various scenarios.
• 【360° Rotatable Clip】Features a 360° rotatable clip for easy attachment to clothing, providing hands-free operation and flexibility during use.
• 【Long-Range Transmission】Ensures clear audio recording and video capture up to 650 feet (200 meters) in both indoor and outdoor settings.
• 【One-Button Noise Reduction】Easily control noise cancellation on the transmitter with a single button, capturing clear and detailed sound even in noisy environments.
• 【Extended Battery Life】Offers up to 6 hours of working time on a full charge, with the compact charging case providing two additional full charges, totaling 18 hours of use.
• 【Plug-and-Play Compatibility】Compatible with Android smartphones, for iPhone 15/16 series, for iPads, laptops, and computers with USB-C ports, requiring no adapters, Bluetooth-compatible, or apps.
• 【Uninterrupted Playback】Unique audio analysis technology allows for continuous playback through the device's built-in speakers without unplugging the receiver.

Specifications:

• BY-V4-TX transmitter:
• Transmission mode: 2.4 GHz
• Signal modulation: Gaussian frequency shift keying
• Polarity pattern: Omnidirectional
• Antenna type: Ceramic antenna
• Operation distance: 200 meters (obstacle-free)
• RF output power: ≤10 dBm
• Distortion: ≤0.1%
• Frequency response: 20 Hz - 20 kHz
• Sensitivity: -42 dB
• Reference audio input level: -20 to -42 dBu (MIC input, 0 dB gain)
• Sampling rate: 48 kHz
• Signal-to-noise ratio: 85 dB
• Audio input: built-in microphone
• Built-in battery capacity: 3.7V/95mAh
• Power supply: built-in lithium battery
• Battery life: about 6 hours
• Charging time: about 2 hours
• Weight: about 11 g
• Dimensions: 53.1 x 18.3 x 10.2 mm
• Operating temperature: 0℃ to 50℃
• Storage temperature: -20℃ to 55℃
• BY-V4-RXU Receiver:
• Transmission mode: 2.4 GHz
• Signal modulation: GFSK
• Polarity pattern: Omnidirectional
• Antenna type: Ceramic antenna
• Operation distance: Up to 200 meters (obstruction-free)
• RF output power: ≤10 dBm
• Distortion: ≤0.1%
• Frequency response: 20 Hz - 20 kHz
• Signal-to-noise ratio: 85 dB
• Audio output: USB-C
• Power supply: Powered by external device
• Weight: 9g
• Dimensions: 62.5 x 18.3 x 10.2mm
• Operating temperature: 0℃ to 50℃
• Storage temperature: -20℃ to 55℃
• BY-V4-CC charging box:
• Battery type: built-in lithium battery
• Built-in battery capacity: 3.7V/1500mAh
• Charging time: about 2 hours
• Power supply: USB-C charging port (DC 5 V / 2 A)
• Number of charging cycles: 1 time (4*TX+1*RX), 2 times (4*TX)
• Weight: about 160 g
• Dimensions: 143.6 x 35.5 x 80.5 mm
• Operating temperature: 0℃ to 50℃
• Storage temperature: -20℃ to 55℃

Note:

• Not compatible with GoPro or other cameras. 
• Enable "OTG" on your device before using the mini microphone; Only compatible with devices with a USB Type-C port.