This product is small in size and easy to carry. It will not be a burden for the elderly or . It will dial your number or number if there is voice higher than 45bD in 4 meters.

Features:
stand by and working .
Prominent sound quality makes it more reliable.
Built in 2 mic, can be heard clearly.
Automatic function: as long as it exceeds 45 decibels in 4 meters, it will automatically call back.
size, easy for carrying.

Specifications:
compatible: GSM / SIM
Microphone (meter): 5-7 Radius
Receive sensitivity: about 10K GPRS
Working temp: -40 to 50℃
Responding frequency: 1.2K-800Khz
Stand-by : 3-5 days (without voice control), 10-15 days (without voice control)
Work frequency: 850MHz, 900MHz, 1800MHz, 1900MHz (please check if it can work with your local system format before purchasing)
: 1 * 3.7V, 300mAh Li-ion
Item size: 35 * 20 * 14mm / 1.4 * 0.8 * 0.6in
Item weight: 25g / 0.9ounce
Package size: 60 * 60 * 30mm / 2.4 * 2.4 * 1.2in
Package weight: 25g

Package list:
1 * Voice System
1 * USB Cable
1 * User Manual