IP54 ensures waterproof and dustproof requirements under basic communication conditions. The 4000mAh ultra high performance large battery is sufficient to support ultra long communication times, and the fully functional type-c can charge, write frequency, program, and connect headphones. GPS positioning (optional) and recording playback (optional) functions can also be added. As a multifunctional 4G dual card intercom, the GS518 provides you with an additional choice.