Product information: 

Alarm method: SOS alarm
Specifications:
Basic single microphone: standby for 10 years, 4G positioning, single microphone recording
Upgrade dual microphones: standby for 15 years, 4G positioning, dual microphone recording
Upgrade quad screen: standby for 15 years, 4G positioning, quad screen recording
Advanced dual microphone: standby for 25 years, 4G positioning, dual microphone recording
Advanced quad screen: standby for 25 years, 4G positioning, quad microphone recording
Flagship dual microphone: standby for 35 years, 4G positioning, dual microphone recording
Flagship quad screen: standby for 35 years, 4G positioning, quad microphone recording
Durable dual microphone: standby for 45 years, 4G positioning, dual microphone recording
Long lasting quad screen: standby for 45 years, 4G positioning, quad microphone recording
Exclusive dual microphone: standby for 55 years, 4G positioning, dual microphone recording
Enjoy four microphones: standby for 55 years, 4G positioning, quad microphone recording
Never charge: plug in and use, dual microphone anti-theft recording