Customs duty on set top box, If you are bringing through baggage ,then your duty liability will change as per your age,stay or bringing as un accompanied baggage,etc. It is freely importable but require licence for importing through Postal after Rs 2000/-(C.I.F). You may visit my sites :www.baggage.globaltaxguru.in ( for baggage); www.postal.globaltaxguru.in (for Postal);
www.courier.globaltaxguru.in ( for courier) and www.ebay.globaltaxguru.in ( if you are an ebay user).
If you want to compare rate of duty for different mode of import such as courier,postal,baggage, air cargo and sea cargo ,then , you can visit www.globaltaxguru.in.
Warm regards
Ravindra Kumar