Smart IoT Hub with Chime SPEC: 2.4 GHz Wi-Fi Networking, 868 MHz for Devices, 100-240 V~, 50/60 Hz, Plug-in FEATURE: Remote Control with Tapo App, 90dB Adjustable Audio Alarm, 19 Ringtones, up to 64 Devices, Home/Away/Sleep Mode, Mute button, Easy Setup,