Product Description Product Name: Visual Smart Doorbell Materials: ABS, PCB, Polymer Batteries, Speakers, Cameras, Hardware white color < p>Battery capacity: 800 mAh Power input: 5 V to 2 A Use time: more than six months with normal use Charging time: 1.5 hours, Intercom Type: Visual Color Camera Resolution: 480x640 Doorbell Machine Size: 8 x 5.3 x 2.2cm / 3.15 x 2 .08 x 0.86 inch Dingdong machine size: 5.5 x 4.2 x 2.5 cm / 2.16 x 1.65 x 0.98 inch (including USB: 1.2 cm / 0.47 inch height) Clock machine weight: 65.7g / 0.14LB Dingdong machine net weight: 23.3g / 0.05LB Packing Size: 14.5 x 10 x 3.5 cm / 5.7 x 3.93 x 1.37 inch Gross Weight: 135 g / 0.29 lb p> 1 * doorbell machine 1 x internal ding-dong machine 1 manual