1.digital video recorder 2.The world's first product, connecting power to start working. 3.Easy to use and install, direct New speical digital video recorder with SD card Product features:1. The world's first product, connecting power to start working.2. Easy to use and install, directly plug in power to work, independent working.3. TF card support, maximum to reach over 16GB.4. 24 hours, all day ...