As scorching summers drive people indoors, Amazon has launched its Great Indian Sale that will deliver great discounts and deals online for four days starting today. Offering eager shoppers and stray browsers a gamut of products across brands at discounts stretching up to 80%, users of the e-commerce portal are poised to have a field day cooped up inside their homes.Amazon's first summer sale of the year is offering steep cuts on apparels, mobiles and accessories, kitchen appliances and other electronic items. Products on offer at incremental discounts during the four-day sale include major brands like Adidas Fastrack and Bombay Dyeing, among others.Battling first-day rush, shoppers will be spoilt for choice as they scroll through endless offers on respective category pages.While a 36% cut on a Voltas AC at Rs 25,990 may be a cool offer for some, others might want to step in on the deal prices United Colors of Benetton and Red Tape are offering on footwear at nearly 65% discounts. Other hot offers include American Tourister bags for less than Rs 800 and over Rs 8,000 off on LG 32 inch televisions - some brands are also offering 43 inch variants for less than Rs 25,000. Apple 's iPhone 7 is also on sale at 27% off with a price tag of Rs 43,999 - down from Rs 60,000.Amazon is also offering heavy discounts on in-house products too like its e-reading device Kindle and Amazon Fire TV Stick. The e-tailer is offering a flat Rs 2,000 off on Kindle Paperwhite and is giving Rs 499 Amazon Pay balance on purchase of the TV stick. Annual Kindle Unlimited e-book subscription has also been brought down to Rs 1,499 from Rs 2,388.What is more, Amazon Prime members are getting early access to deals whereby they get a 30-minute window every day till May 14 to cash in on the best deals before other customers on the platform. Prime shoppers can avail over 75% discounts on electronics like power banks and save Rs 10,000 on 43 inch Samsung Full HD LED TVs. It is also offering a lucrative deal on a Garmin watch at 40% off. Other products on offer include Sennheiser and Audio Technica headphones as well as Sony wireless speakers.Prime users would also get free one or two-day delivery and exclusive deals on other top brands including Apple, Xiaomi , Samsung and Fitbit . They will also get 10% off on Amazon Gift Cards until stocks last.Additionally, Amazon has partnered with Citibank for cashback offers on purchases made through the bank's credit and debit cards. Customers will get 15% cashback via the app and 10% through purchases made on the website. Furthermore, according to the website, shoppers who make a purchase of above Rs 500 via its app will get a discount of Rs 1,000 on domestic hotel booking made on Yatra . Also, topping up Amazon Pay account can give users a chance to win 1 lakh every hour, as per its website.US-based e-commerce major, which has committed an investment of $5 billion in the Indian market - $2 billion in 2014 and $3 billion last year - is leaving no stone unturned to make up lost ground after evidently losing out to rival Flipkart in the Diwali sale last October.While a beleaguered Snapdeal may be out of the race, Flipkart will also be kicking off its ten-year anniversary celebrations with its ' The Big 10 sale ' starting May 14 where the e-tailer will reportedly offer discounts up to 90% on a wide spectrum of categories.