BEFORE PLACING YOUR ORDER CONTACT US SO WE CAN CONFIRM AVAILABILITY AND OFFER YOU A DISCOUNT CODE. YOU MAY DO THIS VIA CHAT OR EMAIL [email protected] SEND US THE PRODUCT NAME AND WE WILL PROVIDE THE DISCOUNT CODE. WE PREFER CHAT TO GET RESPONSE.Our wireless doorbells, featured with 984ft long operating range, 5 adjustable volumes and 55 melodies, plug receivers with indicator light will remind you in time when someone visits your home and you will never miss a visitor. One doorbell receiver can pair with up to 55 transmitters while one transmitter can pair with infinite receivers. Bring much convenience for your multiple rooms design house. Design with smart memory function of last melody setting after a power outage, no need to reset your doorbell melody. IP55 waterproof performance can resist any weather. Easy installment and widely used in your home, apartment, office, warehouses and etc..