Condition: New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging ... Brand: Does not apply origin: Mainland China compatible audio & video equipment style: Professional Audio Equipment hign-concerned chemical: None chipset: ESP32-S3 package: Yes silver 433mhz: K216 silver 868mhz: K214 silver 915mhz: K221 Type: Does not apply