The Sencor SLE 2457M4 has a fairly slow high frequency rate (only 50 hertz) compared to most of the other similar spec TVs that have been on the market for more than two years. Televisions of a comparable spec and age to this television have high frequency rates of between 50Hz and 400Hz.
It may also be worth also looking at one of the other 50Hz refresh rate televisions currently available including because of its better review score, the Toshiba 22D1333B.
If this TV high frequency rate is too slow for you then you might want to consider the Philips 32PHH4100 (£187.98) (60Hz), or the Haier LE24B8000 (60Hz).
What does "high frequency rate" mean?