As a ground-breaking wireless microphone kit, the BOYA BY-WM4 Pro Wireless Microphone system stands out from the outset. The design is still keeping the priority of functionality, and the company has gone one step further than other wireless mics on the market. Apart from offering dual-Channel for capturing audio with dual subjects to users' smartphones, tablets, DSLR cameras, camcorders, PCs, and so on, a set of different useful accessories, and up to 60m (197ft) operation range, the BY-WM4 Pro can be an expandable evolution system that allows the user to mix and match different kinds of receivers while using with the TX4 Pro transmitter.

There are three types of receivers offered in the BY-WM4 Pro series, including the RX4 Pro receiver, which comes with both 3.5mm TRRS and TRS cables so that it can be used with smartphones and cameras; the RXD receiver, with a lightning connector for iOS devices; the RXU receiver, which is designed specifically for Android and other devices with a Type-C jack. Since users can choose different receivers for their usage, regardless of whether they are using smartphones, cameras, or other devices, this concept is striking and significant. Moreover, this wireless microphone kit is really friendly to use, especially for RXD and RXU. Simply plug the receiver into your device, turn on the transmitter and receiver, and you're ready to go.

Super-clear recording sound
Compatible with smartphones, DSLR camerasconsumer camcorders, PCS etc
Lightweight and compact for easy carrying
Omnidirectional lavalier microphone
Easy to usee Hard case included
Standard camera shoe mount and clip included
Up to 50m (164ft)operation range (without obstacle)
Power supplied by two AAA batteries for both transmitter and receiver

RF Modulation: GFSK (Gauss frequency Shift Keying)
Frequency band: 2.4GHz (2405-2478MHz)
Frequency response: 35Hz-14KHz±3dB
Signal/Noise: 84dB or more
Distortion: 0.05% or less (32Ω,1 KHz,65mW output)
RF output level: 3 mW
Earphone output level: 32Ω,65mW
Reception sensitivity: -90dB +/- 3dB / 0dB=1V/Pa, 1kHz
Consumption power: Transmitter: 3V/120 mA
Receiver: 3V/120 mA
Battery life: Transmitter: Approx. 6.0 hours
Receiver: Approx. 6 hours
Dimensions:
Transmitter: 45mm x 70mm x35mm (W/H/D)
Receiver: 45mm x 70mm x35mm (W/H/D)

BY-WM4 PRO-K1 (3.5mm)

1* Wireless Lavalier Transmitter
1* Receiver
1* Lavalier/lapel microphone
1* 3.5mm to TRS audio output cable
1* 3.5mm to TRRS audio output cable
1 * Cold Shoe Mount
1 * Hard Case

BY-WM4 PRO-K2 (3.5mm)

2* Wireless Lavalier Transmitter
1* Receiver
2* Lavalier/lapel microphone
1* 3.5mm to TRS audio output cable
1* 3.5mm to TRRS audio output cable
1 * Cold Shoe Mount
1 * Hard Case

BY-WM4 PRO-K3 (Lightning)

1* Wireless Lavalier Transmitter
1* Receiver
1* Lavalier/lapel microphone
1* LIGHTNING audio output cable
1 * Cold Shoe Mount
1 * Hard Case

BY-WM4 PRO-K4 (Lightning)

2* Wireless Lavalier Transmitter
1* Receiver
2* Lavalier/lapel microphone
1* LIGHTNING audio output cable
1 * Cold Shoe Mount
1 * Hard Case

BY-WM4 PRO-K5 (USB-C)

1* Wireless Lavalier Transmitter
1* Receiver
1* Lavalier/lapel microphone
1* USB-C audio output cable
1 * Cold Shoe Mount
1 * Hard Case

BY-WM4 PRO-K6 (USB-C)

2* Wireless Lavalier Transmitter
1* Receiver
2* Lavalier/lapel microphone
1* USB-C audio output cable
1 * Cold Shoe Mount
1 * Hard Case

BY-WM4 PRO RXD