คำอธิบาย
- Four Keys : Call/Cancel/Water/Bill
- RF Frequency : 433MHz
- Modulation Mode : ASK (AM)
- Material : ABS
- Power Supply : 12V/23A battery (included)
- Transmission Distance : Up to 250m(in open area) and 50m(in room)
- Waterproof : IPX4
- Base Size : 112 x 72 x 49mm
- Acrylic Plate Size : 158*100mm
- Weight : 380g
- 10 x Call Button