For Galaxy Tab A 8.4 (2020) T307 PC + Silicone Shockproof Combination Case with 360 Degree Rotating Holder & Handle(Rose Red + Grass Green) Tag-Wireless Doorbell please connect the power adapter

please connect the power adapter to the hub when using high-power devices

Working principle: the transmitter is installed outside the door

90 degrees need to be notified in advance

Supported systems: Windows XP / 7 / 8 / 10 / 11

and the viewing distance can be adjusted wider

For Galaxy Tab A 8.4 (2020) T307 PC + Silicone Shockproof Combination Case with 360 Degree Rotating Holder & Handle(Rose Red + Grass Green) Tag-Wireless Doorbell please connect the power adapter1. Simple and easy, comfortable, easy to carry. 2. Unique design with a handle, can be used for support. 3. Provide a full protection from dust, shock, scratches and bumps and other daily damage. 4. All buttons and ports are easy to access. 5. With good performance and high quality material, it may work for a long time.