SHANYU Self-powered Wireless Doorbell Kit Home Security Waterproof Doorbells Volume Adjustable

• Adopt self-powered technology, no need battery, pressing transmitter to produce power, energy saving
• Choice of 58 chimes, loud and clear sound, just swipe your finger up or down and you will get what you like
• 4 volume levels. You'll be happy to know that you have the option of turning the chime down or up--a great option for different environment
• Original advanced IC with standby technology, super low power consumption

• Adopt self-powered technology, no need battery, pressing transmitter to produce power, energy saving.
• 180 meters free-barrier transmission range offers you the freedom to go anywhere in your home without missing a delivery or visit again.
• Choice of 58 chimes, loud and clear sound, just swipe your finger up or down and you will get what you like.
• 4 volume levels. You'll be happy to know that you have the option of turning the chime down or up--a great option for different environment.
• Original advanced IC with standby technology, super low power consumption. 
• Stable working, strong penetration, made by high advanced SMT machine.
• Advanced intelligent power management IC circuit, more safety.
• Unique sliding button, full of technological sense. Simple design, elegant appearance and high quality.

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