PrsTech Digital Door Spy

This electronic door viewer features a 4.3-inch LCD display (approximately 10.9 cm) and a viewing angle of 120 degrees. It can be easily installed into the hole of an existing door viewer without the need for drilling. It is suitable for doors with a thickness of 38 to 110 mm. From the outside, the product looks like a regular door viewer. The device is activated by pressing a button, making it easy to use for both children and seniors. The activation time is less than one second. The door viewer measures 13.6 x 7.8 cm and has a resolution of 800 x 400 pixels. It requires four AAA batteries for operation, which must be purchased separately.