If you have issue with Wi-Fi connectivity, using a dual band router and have a fairly larger space to cover then the TP-Link RE450 Wi-Fi extender is for you.
TP-Link RE450 Price in India is Rs. 4,999 you can buy here – https://amzn.to/2HMaMJx
TP-Link RE450 Specifications
AC1750 Wi-Fi Range Extender
Coverage up to 10,000 sq ft
comes with Gigabit wired speed port
Easy to connect supports WPS
Intelligent signal indicator the LED color turns blue when signal is good and red when signal is bad
Wireless type : 802.11.a, 802.11.b, 802.11.g, 802.11.n, 802.11.ac
2.4GHz + 5GHz
Triple antennas