This is a commonly found Low-Cost Chinese brand from Lintratek 900 MHz Linear Yagi Antenna (http://www.lintratek.com/201512/14/83.html). (p/n : OBM-5NK-82/96) This particular model has 10 dBi of gain (10x over isotropic antenna), 7.85 dB ( ~ 6x over a dipole antenna).
Their company has a wide array of many element models to choose from up to 16 elements @ 16 dBi.