Meco 300m Smart Wireless Digital Doorbell Phone Home Security 2 Receiver 36 Music Ring Tone Door Bell

Features : As an intelligent doorbell different from traditional wireless doorbell, this product, with simple operation, convenient use and stable signal transmission, applies to apartment, villa, unit family, hospital and other occasions. Simple appearance design, elegant and unique. Ultra-low power consumption design, power saving and lasting. Ultra-long distance control, stable signal Indoor ringtones volume is adjustable. 36 chord ringtones for option. Specification : Transmission Distance: 300m / 984ft Operating Frequency: 4 33.92MHz 200KHz Power: 0.1W Volume: 25-110dB Indoor Receiver Voltage range: AC 110V-220V Operating temperature: -10 - 55 Size: Approx. 96 * 62 * 32mm / 3.78 * 2.44 * 1.26inch Outdoor Transmitter: Voltage range: DC12V 23A Alkaline batteries * 1 (Built-in) Operating temperature: -20 - 65 Size: Approx. 75 * 43 * 17mm / 2.95 * 1.69 * 0.67inch Color: Black, White (Optional) Plug type: US, AU (Optional) Package includeds : 2 x Indoor receiver 1 x Outdoor transmitter 1 x User manual 2 x Screw 1 x Double-sided adhesive tape Details pictures :