With the Fourth of July potentially marking record high temperatures across parts of the country amid a heat wave affecting much of the nation, Sony Electronics begins US shipments of the Reon Pocket Pro Plus. Offered in Japan since 2019, this wearable device for heating and cooling resembles futuristic space equipment. I received an early preview of the technology and tested it over several days. Below is a full breakdown of its capabilities along with my observations.

The portable Reon Pocket Pro Plus weighs 8.7 ounces and fits around the neck beneath clothing for a low-profile appearance compared to other fans. A stainless steel plate touches the skin, allowing manual control of cooling or warming from 41 to 104 degrees Fahrenheit via the companion app for Android, iOS or WatchOS or directly on the unit.

Smart sensors adjust temperature so you don't have to

Smart mode is available through both the app and the device. Users define a preferred temperature range in the app, and built-in sensors for temperature and humidity along with the separate environmental sensor clip adjust the plate automatically to maintain comfort levels.

The standalone Reon Pocket sensor measures surrounding conditions and shows readings in the app. Keep it uncovered for accuracy; a carabiner clip makes attachment to bags or belts simple.

Controls on the unit itself include start-stop, warm, cool, smart mode and temperature adjustment buttons, each paired with LED indicators.

How the Reon Pocket Pro Plus works

A Peltier semiconductor element powers the plate. Electric current creates cooling on one side and heating on the other. A high-capacity fan, vapor chamber and heat fins expel warmth from the interior to boost skin-side cooling performance.

Initial use showed rapid temperature shifts. Switching between modes produced an immediate sensation on the upper back. Though not intended for whole-body relief, the localized effect proved noticeable and the cool setting offered welcome comfort.

The unit lacks waterproofing, limiting use during heavy perspiration or extended exposure to direct sunlight. Since its primary purpose is cooling in warm conditions, this represents a notable limitation.

Designed to be discreet, depending on what you wear

An adjustable, bendable neckband secures the device so the plate contacts upper back skin. Removable extension tips allow length customization.

The neckband shows above clothing, with the rear air vent most visible. A shorter vent cover suits collarless shirts such as T-shirts. In cool mode, the vent may release warm air based on outside conditions.

The device felt lightweight and comfortable overall, though the plastic neckband would benefit from softer covering.

Performance was optimal during seated or low-movement activities. Frequent repositioning was needed with upper body motion, confirming suitability for walking or hiking rather than intense workouts.

Silence and battery life are golden

Quiet operation stands out as a strength. Testing revealed only a brief sound at startup, with no further noise.

Battery endurance reaches 15 hours on the cool smart setting. A full recharge of the 3,000-mAh cell takes roughly three hours and 20 minutes.

Price is a drawback

The $260 price stands as the primary concern. While it lacks equivalent discretion, quiet performance or heating capability, comparable handheld options top out lower in cost.

Orders include estimated delivery between July 27 and 28, free shipping, 30-day returns and a one-year warranty. The package contains the sensor tag, short vent cover, and USB-C cable.

The Reon Pocket Pro Plus demonstrates new options for discreet and adaptable personal climate control. Greater affordability and reduced need for repositioning during movement would improve it further.

Budget-conscious buyers seeking summer relief may prefer handheld alternatives. Those prioritizing silence and a subtle profile with available funds will find the Reon Pocket Pro Plus worthwhile.