Set di campanello senza fili, 2 trasmettitori e 3 ricevitori, 7 colori di luce brillante e 4 livelli di volume, per casa e ufficio, anziani e persone con problemi di udito

Two transmitters and three receivers: Loud volume for home use, 7-color light alert, long-range wireless flashing doorbell, suitable for home use, one-button calling, and home security monitoring. The transmitters and receivers connect wirelessly to transmit wireless signals. When the button is pressed, the receiver emits pleasant music and flashes seven-color lights simultaneously, making it easy to hear and see at night. The doorbell volume is unmistakable; four volume levels are adjustable, and the doorbell sound is clearly audible within a 150-square-meter area. No matter the size of your house, you won't feel intimidated or disturb visiting friends. Low power consumption, environmentally friendly and energy-saving design, requiring only 11 AA batteries; each of the three receivers requires three batteries, and each of the two transmitters requires one battery. It can be used for 3 to 5 months, with no safety hazards, no overheating, safe and reliable, and suitable for various environments. Rain and typhoon weather do not affect its use. Easy installation, good sound insulation, and no damage to walls. High-quality double-sided tape is used; simply press, tear, and snap to complete the installation easily. You can install it yourself; it's sturdy and durable, won't damage walls, or you can use screws for fixing. This doorbell set is incredibly easy to install, taking only a few minutes. Since the button and receiver are pre-paired in the box, you simply press the button and insert the batteries as needed. After that, the doorbell set is ready to use! Key specifications: Complete doorbell set including 2 transmitters and 3 receivers. Interference-free digital signal with an effective range of up to 300 meters. Volume up to 110 decibels, 8 adjustable levels. Compact and easy to install on any door frame.