Wireless Strong Flash Music Doorbell Old Man Deaf Person Illuminated Doorbell Light Doorbell Doorbell Service Pager Features: 1. Designed with elegant polished sand , looking concise and generous. 2.The seven-color slides flashing, which not only add a beautiful room, but also make it a good choice for deaf and deaf people 3. Receiver uses 3 batteries No. 5, which can be carried with you. It is easy to install and use. The remote controller uses 1 batteries No. 7, which is also convenient to replace. 4. 16 pieces of music for choice, which is personalized and will meet your unique needs. 5. Strong anti-interference ability. s: 1.When the transmitter outside the house is pressed, the transmitter has blue light, and the receiver will ring the selected music, with seven colors of flashing light 2. Three working modes: 1. Flash only; 2. Ring only; 3. Ring and Flash simultaneously. 3. Unique flash design makes it more suitable for the patients, the elderly, the deaf. Specifications: Color: white Model: TMT-288 Size: 9*6.2*3.3mm Power supply mode: battery power supply Power supply voltage: 4.5 (V) Ring tone: Hexuan music Power consumption: 1 (W) Scope of application: home, office ,elderly, deaf ,patient caller Package Included: 1 X Wireless doorbell Notes: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.Due to the manual measurement and different measurement methods, please allow 1-3cm deviation. Thanks