YisTech Wireless Motion Sensor Detect Alert, Home Security Driveway Alarm, Motion Detector Store Door Entry Chime Doorbell, Caregiver Pager for Elderly/Kids (1 Motion Sensor 2 Receiver) 1 Motion Sensor 2 Receiver audio Note:To keep the tuning fork

Note:To keep the tuning fork more accurate

After connecting it

2 connection technology for better and more stable sound

iPad or other USB-C devices that support USB Power Delivery

all while improving speed and efficiency

YisTech Wireless Motion Sensor Detect Alert, Home Security Driveway Alarm, Motion Detector Store Door Entry Chime Doorbell, Caregiver Pager for Elderly/Kids (1 Motion Sensor 2 Receiver) 1 Motion Sensor 2 Receiver audio Note:To keep the tuning forkYisTech Wireless Motion Sensor Detect Alert, Home Security Driveway Alarm, Motion Detector Store Door Entry Chime Doorbell, Caregiver Pager for Elderly Kids (1 Motion Sensor 2 Receiver) Motion Sensor: The motion sensor activates when movement occurs within 16. 4ft range x 110. This transmits a signal to the plug in receiver and alerts you with a ringtone every time the sensor is activated by motion. Wireless Plug in Receiver: The wireless plug in