gdm200m

for cook call waiters to pick up dishes when they are ready. make a good repast enviroment improve work effeiciency Parameter:Model: GDT-jpSpecification: 100x140x15mmWeight: 0.2kgColor: blackMaterial: ABSPower supply model: USB interface or AC 220V (adaptor)Key grade: millions pressingFrequency: 315MHzPower: 50MwSignal Distance: 1000m (no obstacle)Capacity: can connect with 100pcs pager and ...