Makullin Smart na Hy-4 shine babban aikin tsaro na gida wanda ke nuna mafi kyawun ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar ƙwayar cuta. The front panel measures 161.5×73.3×30 mm, and the back panel is 168.5×72.5×51.2 mm, suitable for standard wooden and metal doors with a thickness of 35mm to 55mm. Sanye take da kayan sannishin Semprons, yana tallafawa yatsan yatsa 50 tare da ƙimar karbar karancin karancin karancin karancin kasa da kashi 0.001%, yana ba da damar dacewa da inganta tsaro.

Hy-4 yana ba da damar shigarwar kalmar sirri na lambobi 6 zuwa 16, ana iya daidaita don riƙe kalmomin shiga cikin lambobi 100, tare da fasalin lambar don ƙara kariya. Baya ga maɓallan taɓa taɓawa, ya zo da maɓallan injiniyoyi biyu a matsayin madadin don gaggawa. An ƙarfafa ta baturan AA huɗu, yana da gidan zama na kimanin watanni 10. Mai tilas tare da Ans Bhma A156.25 Standard, yana aiki a cikin yawan zafin jiki na -35 ℃ zuwa + 70 ℃, yana ba shi daidaitawa ga mahalli daban-daban. Kwallan Hy-4 da sauri a cikin 1 na biyu, samar da tsaro, dacewa, da ingantaccen kwarewar mai amfani.