BOYA BY-V4 Lightning 4-Channel Mini Wireless MicrophoneBOYA BY V4 Lightning 4 Channel Mini Wireless Microphone Supports up to 4 mics recording simultaneously; Automatic pairing for plug and play. Dual noise cancellation: BOYA Audio's one click noise cancellation tech and windshield for clear sound capture in noisy environments The TX features a rotating clip and an omnidirectional in built capsule, enabling sound pickup at 360. SNR 80dB and 48 kHz 16 bit recording for better than CD audio recording 120dB