• 【4-Channel Wireless System】Offers professional-grade audio freedom with four mono transmissions, ideal for seamless recording and video production in various scenarios.
• 【360° Rotatable Clip】Features a versatile clip for easy attachment to clothing, providing hands-free operation for convenience.
• 【Long-Range Transmission】Ensures clear audio capture up to 650 feet (200 meters) in both indoor and outdoor settings.
• 【One-Button Noise Reduction】Easily control noise cancellation on the transmitter, capturing clear, detailed sound even in noisy environments.
• 【Extended Battery Life】Enjoy up to 6 hours of operation on a single charge, with the charging case providing two additional full charges for a total of 18 hours of use.
• 【Plug-and-Play Compatibility】Supports 3.5mm interface digital cameras/DSLR/camcorder/voce recorder devices.
• 【Real-Time Monitoring】Unique audio analysis technology allows for uninterrupted playback through your device's built-in speaker 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: 3.7 V/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-RX 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
• Battery capacity: 260mAh
• Battery life: 2 TX mode about 10 hours; 4 TX mode about 6 hours
• Charging time: about 2 hours
• Audio output: 3.5 mm TRS
• Power supply: built-in lithium battery
• Power supply weight: 16 g
• Dimensions: 62.5 x 29.4 x 13.5 mm
• 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℃