Wireless intercom doorbell - 1 outdoor doorbell can be paired with 1 indoor doorbell, the perfect combination allows you to communicate with visitors at your door.<br> <br> <br> Intercom Two-Way - When someone presses the call button on the outdoor unit, the indoor buzzer will ring immediately to remind you. You can press the answer button to talk to someone outside.<br> <br> <br> Clear voice - Built-in high-sensitivity microphone and speaker, the signal 2.4 GHz provides clear and fluent sound effect when communicating. Effective transmission distance up to 300 meters<br> <br> <br> Easy to use - Ultra mini size ensures perfect portability and easy installation, small and beautiful, easy to install. Suitable for home, factory, hotel, hospital, supermarket and office. adventure! Product transmission distance: 200 meters in open space; 5-50 meters if there are obstacles.<br> <br> <br> feature<br> <br> <br> 1. The frequency of use of this product complies with national regulations and will not produce harmful electromagnetic interference. It can be used universally.<br> <br> This device complies with FCC, CE and CCC rules and regulations.<br> <br> <br> 2. The outdoor unit is easy to install and battery-remove, using 4 AA batteries (batteries not included), and the indoor unit uses a rechargeable lithium battery.<br> <br> The outdoor chime is powered by 4 alkaline batteries for easy battery replacement<br> <br> 3. The outdoor unit has a long service life, and 4 batteries can be used for more than six months.<br> <br> Low power consumption, outdoor bell standby time up to six months<br> <br> 4. Speaker sound, adjustable volume, changeable ringtone, clear intercom sound quality, can be used for mobile intercom.<br> <br> The speaker is adjustable, the sound is clear and it can be used as a mobile phone walkie-talkie.<br> <br> <br> 5. Long working distance, the maximum opening distance is 200 meters.<br> <br> Ultra-long wireless distance up to 200M<br> <br> <br> 6. Easy to install, directly stuck to the wall with 3M glue.<br> <br> Easy wall mounting with 3M adhesive tape<br> <br> <br> 7. Through code-to-code learning, one outdoor unit supports N indoor units without interfering with each other and without changing the code.<br> <br> By learning the code, the outdoor chime can be paired at the interior chime. An external ringtone can be paired with N internal ringtones without interfering with each other.<br> <br> <br> 8. Exquisite and small, beautiful and generous. Size : 100*60*14.8mm<br> Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be some color difference, depending on the physical object received Delivery Quantity: (according to the main picture).Items from Sheng Xinshun's shop