Camera and Photography Equipment Design SJ20 Dual Lens Action Camera by Shenzhen Zhencheng Technology Co., Ltd SJ20 Dual Lens is a modular action camera made for both daytime and nighttime recording. The camera weighs less than 150 grams and measures 7.04 by 5.03 by 2.63 centimeters. A second lens with a separate light sensing element captures clear images in dim conditions. A module interface on the side accepts batteries and brackets that extend recording time and add new recording forms. The metal body reduces overheating during long sessions. All settings are controlled on a 2.0 inch touch screen. The camera records 4K video for at least one hour.