We investigate the upper critical field anisotropy ${Gamma}_H$ and the magnetic penetration depth anisotropy ${Gamma}_{lambda}$ of a high-quality $FeSe_{1-x}$ single crystal using angular dependent resistivity and torque magnetometry up to 14 T. High quality single crystals of $FeSe_{1-x}$ were successfully grown using $KCl-AlCl_3$ flux method, which shows a sharp superconducting transition at $T_C{sim}9K$ and a high residual resistivity ratio of ~ 25. We found that the anisotropy ${Gamma}_H$ near $T_C$ is a factor of two larger than found in the poor-quality crystals, indicating anisotropic 3D superconductivity of $FeSe_{1-x}$. Similar to the 1111-type Fe pnictides, the anisotropies ${Gamma}_{lambda}$ and ${Gamma}_H$ show distinct temperature dependence; ${Gamma}_H$ decreases but ${Gamma}_{lambda}$ increases with lowering temperature. These behaviors can be attributed to multi-band superconductivity, but different from the case of $MgB_2$. Our findings suggest that the opposite temperature dependence of ${Gamma}_{lambda}$ and ${Gamma}_H$ is the common properties of Fe-based superconductors.