PLEASE NOTE: THIS PRODUCT HAS TO BE PAID FOR BEFORE DELIVERY, WHICH IS BY 14 WORKING DAYS AFTER PLACING ORDER
1. Using wireless transmitting and receiving technology, do not need any cost, put a battery can be used directly
2. The use of extemal environmental protection type lithium battery and 9V battery. After use can be removed at any time so as to avoid unnecessary waste battery
3. The sound clear, ultra high sensitive clear pickup, at a distance of a few meters away from the transmitter quartz watch “tick” sound can be heard clearly
4. Transmitter distance of 4 transmitters to achieve the best effect. Open the straight line distance can reach more than 500 meters away from residential areas as the building use, different up to 50-300 meters.
5. High sensitive receiver 5 dedicated, frequency is not within the scope of public, otherequipment can be receive, have strong security.