20 meters barrier-free transmissionBuilt-in high-performance chip, barrier-free 15-20 meters long-distance transmission, strong anti-interference ability, more stable signal transmission | Wide voltage range for global applicationWide-range voltage design, 100V~240V AC is universal in the world Adopt in-line design, plug and play, long-lasting battery life | Authoritative 3C certification is more secureIt has passed the national 3C testing and certification, and has built-in multiple protections such as overcharge, overcurrent and overtemperature. |