ContalkeTech CTET-2610 2 watt UHF 400-480 Walkie talkies 16CH VOX Channel Lock Emergency Alarm 2 Way Radio for shopping mall/Outdoor with programming cable (4 Pack) TOT Function; Time-out Timer ;Monitor; Scan Function, SOS Emergency Alert Frequency range: 400-480MHz(UHF) Channel No.: 16 Programmable Amateur Radio Battery Saver, Low Battery Warning1100mAh battery capacity available for 3 days at standby status High /Low Power Selectable 3W/2W; 3km long distance communication range or 10 floors coverage inside the building with clear audio! High penetrating power! Easy to carry with included belt clipsExcellent for users in outdoors and indoors, hunting, pubs, bars, paintball, restaurants, hotels, warehouses, party, office buildings and other noisy environments.