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Function
Audio Built-in speaker
Set Button Pairing setting and ring tone selection
Volume Button Yes
RF433 Yes （transmission distance: up to 100m under an open environment without interference; through-wall capability: ≤ 2 walls）
WIFI No
Indicator Built-in indicator

Others
Power Two 1.5V AA Alkaline dry batteries
Environmental Protection RoHS 2.0，REACH，WEEE， directive94/62/EC
Working Environment -20℃~50℃, Humidity: less than 95% (non-condensing)
Dimensions(mm) Ø73mm ×32mm
Weight (net) Approx. 60g
Installation Wall mounting, desktop