Retekess TD103 Restaurant Pager System. 1.25 inch barlow By tuning the transmitter and

By tuning the transmitter and receiver to the same frequency

Approx 12 hours (digital)

Battery capacity: 400mAh

so there's no need for additional UV or IR blockers with these filters

Retekess TD103 Restaurant Pager System. 1.25 inch barlow By tuning the transmitter andRetekess TD103 Long Range Coaster Pager System 1000m Out of Range Alarm for Restaurant, Hospital, Warehouse Retekess TD103 long range coaster paging system 1000m Infrared technology, FM technology, Waterproof IP54 More than 1000 meters coverage in open area 7 prompt methods: vibration, flash and beep, combine freely Out of range alert; Service countdown notice Adjustable reminder duration: 5 99s Support protocol (contact us if you need) Note: Please