Sony's Reon Pocket Pro Plus Matures Peltier Cooling From 2019 Crowdfund to Year-Round Wearable

Sony's Reon Pocket Pro Plus uses Peltier-effect thermoelectric cooling via a metal plate against the back of the neck, achieving a 20 percent cooling improvement over its predecessor. Priced at $260, it adds a four-level warming mode for winter. The concept originated as a 2019 Japanese crowdfunding project. Engadget's August 2026 review found it genuinely effective during heatwave conditions, though real-world battery life fell well short of Sony's claims.