WARRANTY -30 days free return and replace promise and 1-year quality service. Any quality problem with the item, Please contact our customer service team directly. LOW BATTERY ALERT - This intercom has a low battery alert while the radio is low battery, it will send a voice prompt every 20 seconds until it is turned off. CUSTOMIZED RINGTONE & ADJUSTABLE VOLUME - This wireless intercom system has 5 different ringtones to choose from. And 8 volume level for a crisp, clear sound ensuring that you can hear the ringtone anywhere in your home. EASY TO USE - Just need to use it like a phone, it rings and you answer it. This intercom is designed with wall-mount and lanyard holes so in addition to the hand-held ways also supports wall-mount and hanging. (NOT PROVIDE LANYARD AND SCREW). RECHARGEABLE - This intercom uses a 1000mAh rechargeable li-polymer battery that supports 72-96 hours standby or 8 hours usage on a full charge. HANDS FREE INTERCOM SYSTEM - This reliable full duplex intercom is hands-free two-way communication, through this wireless intercom to talk to family members in real time.