About us, Professional factory, welcome to our store for more choices with best price. What we pursue is your satisfaction of our service, not just for our goods. For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. We will reply you about any question you ask within 24 hours.
Transmission distance : Max 1000m(in theory, open field). In reality it's about 100 ~ 500 meters without barrier.