Features Suitable for youtube, vlogging, facebook, podcasts, mobile messaging phones and more 2.4GHz digital band Two-channel wireless receiver Mini-receiver Super clear recording sound Barrier-free operating range 60m 3.5mm headphone monitor jack Volume keys Stereo / mono switchover (Applicable to models: BY-WM4 PRO RXD / RXU) Omni-directional lavalier microphone zip bag Compatible with smartphones, tablets, laptops OYA BY-WM4 PRO is an economical, light and simple microphone, specially designed for photography enthusiasts and photographers, BY-WM4 PRO is a new generation of 2.4 GHz wireless microphone The microphone, two-channel for reception in two bodies, can be used with smartphones, tablets, SLRs, video cameras, computers and more. BY-WM4 Pro-K3 Lightning iOS dedicated microphone system one n-to-one. It consists of a bodypack transmitter (TX4 Pro) and a portable receiver (BY-WM4 PRO RXD) and accessories.