<p>➀ Holtek introduces a battery-free wireless doorbell reference design utilizing kinetic energy harvesting, generating 600µJ per button press for RF transmission;</p><p>➀ The solution operates at Sub-1GHz frequencies (315-915MHz) with self-powered OOK modulation, supporting over 200,000 press cycles and integrated encoder/decoder MCUs;</p><p>➁ Features include a low-power receiver (-106dBm sensitivity), simplified RF circuitry, and complete design resources (BOM, schematics) for easy implementation.</p>