Feature: 1. 2 Way Intercom: Due to babysitting, caregivers cannot always be with the patient when they need help. Intercoms are designed compatible with them to seek help or communicate, and they no longer need to shout to get someone's attention. 2. Protecting Pregnant Women And Babies: Because intercom systems do not produce radiation like cell phones, they can guard the health of pregnant women and babies. 3. Adjustable: Portable intercom system with 2 channels A and B and 3 volume levels that can be adjusted by the user according to his preference. 4. Wide Application: This clear sound quality intercom system is suitable compatible with use in different application scenarios, such as hospitals, hotels, factories, teahouses, etc. 5. Good Endurance: This intercom can be used compatible with up to 48 hours on a single charge. It can be recharged once every two days to ensure use. Specification: Item Type: Wireless Voice Intercom Doorbell Model: H8 Material: ABS Single Intercom Power Supply Battery: 1 Lithium Ion Battery 1800mAh ( Built In Carry ) Use: Widely used in homes, offices, laboratory environments, medical, etc. Basic Parameters: Operating Temperature: Approx. -20℃-55℃ / -4-131℉ Transmission Distance: 1000m In The Empty Space; 20~50m Across The Wall Working Frequency: 410M - 490M Sound Adjustment: Three Gears Adjustable. Package List: 2 x Intercom2 x Charging Base2 x Charging Cable (Random Color)1 x Manual