Product information:

Microphone Type: Wireless
Display: none
Wireless: yes
Pointing feature: none
Channels: 2
Color: BY-WM4 PRO K3 (Apple interface), BY-WM4 PRO K5 (Android)
Power supply: battery (bring your own)

Characteristic:
Clear recording sound
Compatible with mit smartphones, DSLRs, Verbraucher cameras, PCs and more.
Lightweight and compact for easy portability
Omnidirectional lavalier microphone
Easy to handle
Including hard case
Includes standard hot shoe mount and clip
Up to 25m (82ft) operating range
Powered by two AA batteries

Packing list:

BY-WM4 PRO-K3: Designed for Lightning iOS devices. It comes with a bodypack transmitter (TX4 Pro) and a tiny receiver with Lightning connector (BY-WM4 PRO RXD), and an omnidirectional lavalier microphone.
BY-WM4 PRO-K5: For easy use of Android and other Type-C devices, consisting of a bodypack transmitter (TX4 Pro) and a tiny receiver with Type-c connector (BY-WM4 PRO RXU), omnidirectional collar clip-on microphone.