Saramonic Wireless Lavalier Microphone, Blink500 B2 2.4GHz Lapel Mic Chargeable
It has been paired in advance and can be used directly. [Compact Size] The transmitter is only 26.5g (0.93oz), size: 62×33×15.5mm, built-in microphone, and a clip on the back can be directly fixed to the collar for use.