The Night Vision Device can be used in day and night. You can view clearly even in complete darkness through this device. The image sensor is SONY Sensor(starlight level). The farthest night vision distance is 500m. The picture and video of WG550B are saved to SD card, they also can be download. 1Product Name: Night Vision Binouculars. 2Optical Zoom: 20X. 3Digital Zoom: 4X. 4Angle of View: From 1.8°to 68°. 5Objective Aperture: 30mm. 6Exit Pupil Distance: 12.53mm. 7F# for Objective Lens: F=1.6. 8View in the dark: 500M. 9Size: 1/2.7. 10Image Resolution: 4608×2592. 12IR Wavelength: 850nm. 13Working Voltage: 4V-6V. 14Power Supply: 8AA. 16HDMI Supporting: HDMI. 17Storage: Micro SD card. 18Screen Resolution: 854 X 480. 19Size: 210mm(Length) 161mm(width) 63mm(Height). 20Weight: 0.9KG. 21Certificate: CE, FCC, ROHS, Patent protected. 1x Night Vision Binoculars. 1x 64GB SD Card. We are not responsible for wrong or undeliverable address. Supplying best quality battery for your laptop at competitive prices and proving best service to international customers! Make you 100% satisfied Customers Service. We are a security monitoring shop, mainly dealing in camera parts. Such as monitoring, camera accessories and chargers. All our item passed FCC / CE / ROHS certificates. Help buyers reduce the risk of damage, fire, dangerours mostly. We try our best to reply to you as soon as possible, however, due to high volume of daily incoming emails. Please give us an opportunity to try and make it right before leaving feedback. If you have any question.