Amazon: EvoFox Hailstone S Clamp-Mount Smartphone Cooler with Temperature Display at ₹689

At a glance

The EvoFox Hailstone S is a clamp-mount smartphone cooler aimed at mobile gamers, listed at ₹689 on Amazon India. The advertised claim of 62% off could not be checked because the merchant page did not expose an explicit MRP, so only the ₹689 selling price is confirmed. The product is in stock, ships from Amazon, and is sold by Kay Kay Overseas Corporation.

Quick facts

• Price: ₹689 (confirmed on the product page)
• Advertised discount: 62% off (MRP not shown on page, so unverified)
• Cooling: 15W semiconductor cooling with 3 levels
• Fan: 5000 RPM, 7-blade
• Extras: Temperature display, RGB lighting
• Power: Type-C powered (needs an external power source)
• Compatibility: Android and iPhones, clamp mount
• Seller: Kay Kay Overseas Corporation, ships from Amazon

Product overview

The Hailstone S is a clip-on phone cooler that uses a semiconductor (Peltier-style) plate plus a 7-blade fan spinning at up to 5000 RPM to pull heat off the back of your phone during long gaming or recording sessions. It offers three cooling levels up to 15W, a small temperature display so you can see the plate temperature, RGB lighting, and clamps onto most Android phones and iPhones. It is powered over USB Type-C, so it needs a cable and a power source — it has no internal battery.

Reasons to consider

• At ₹689 it sits at the budget end of phone coolers, well below branded alternatives.
• The temperature display and 3-level control are features often missing at this price.
• Clamp mounting fits a wide range of phones without adhesives.
• Same-day/one-day delivery options were shown for the listing, and it is Amazon-fulfilled.

Pros and cons

Pros

• Confirmed ₹689 selling price, in stock
• Semiconductor cooling with adjustable levels
• Temperature readout and RGB
• Type-C powered, broad phone compatibility

Cons

• Needs constant external power — no battery, so it adds a cable while gaming
• The 62%-off figure could not be verified against an on-page MRP
• Adds bulk and weight to the phone; effectiveness varies by device and game
• Budget brand — long-term durability is unproven

Buyer fit

This suits mobile gamers on a tight budget whose phones throttle or heat up during extended sessions, and who are fine being tethered to a power source. Casual users or those who play in short bursts will likely not need an active cooler at all.

Final verdict

At a confirmed ₹689 this is a reasonable price for a feature-rich budget phone cooler — worth picking up if phone overheating is a real problem for you. Treat the 62% discount as an advertised figure rather than a verified saving, since no MRP was visible on the listing.