Parts List: 1 x Doorbell Machine 1 x Internal Ding-Dong Machine 1 x Charging Cable 1 x Adhesive Installation Aid 1 x Manual Product Specification: Product Name: Video Doorbell Main Material: ABS Product Size: Doorbell Machine: 8x5.3x2.2cm/3.15x2.08x0.86 inch Dingdong machine:5.5x4.2x2.5cm/ 2.16x1.65x0.98 inch (including USB: 1.2cm/0.47 inch height) Battery Capacity: 800 mAh Battery: Built-in rechargeable battery Night Vision: 850N Night Vision Light Video Calls: Support remote video calls Voice Changing Function: Female voice to male voice Number of Songs: 38 Cloud storage: ?E Support Watching Playback: ?E Visitor Capture: ?E Camera Resolution: 480x640 Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2. Please allow slight dimension difference due to different manual measurement. Thank you for your understanding.