- Reliable£ºThe frequency of use of this product is in accordance with national regulations and will not cause harmful electromagnetic interference, which is universal worldwide.
- Long Standby Time£ºLong Service Life:Outdoor?bell is power supplied by 4pcs AAA battery (not included), easy to replace the battery. Indoor?bell is used with an external USB data cable.
- Large and Adjustable Speaker:Big and adjustable speaker, clear voice, can be used as mobile interphone.
- Long Working Distance:Long working distance, the maximum open distance can reach 200m / 656.2ft.
- Low power consumption, long standby time for outdoor?bell up to 4 months.
