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【What is REON POCKET?】REON POCKET is a wearable thermo device that can directly cool or warm the skin surface in contact with the main unit. It supports both cooling and warming, so it can be used in "summer" and "winter." *REON POCKET is not intended for use as a measure against heatstroke. Please refrain from using it when the temperature is 35°C or higher, or for extended periods in direct sunlight, or during work or exercise involving heavy sweating. 【Up to approx. 2x longer runtime with increased battery capacity】Runtime is up to approx. 2x longer (※1) due to increased battery capacity. It can be used for about 7 hours even at COOL level 3. While strengthening the battery, we have also revamped the design, maintaining a more powerful yet compact body. The air intake is designed for more efficient air circulation. Furthermore, by enlarging the heat dissipation mechanism, we have achieved up to approx. 1.2x (※2) heat absorption performance. ※1 Comparison of runtime with the previous model RNP-3. Varies depending on usage and environment. ※2 Comparison of heat absorption performance at maximum cooling level (average heat absorption amount for 60 minutes after operation started) with the previous model RNP-3. Varies depending on usage and environment. 【5 sensors detect temperature, humidity, and activity】In addition to newly equipped temperature and humidity sensors, three temperature sensors detect temperature and humidity. Furthermore, an acceleration sensor detects activity. Based on the information detected by these sensors, smart functions suitable for the situation are provided. 【SMART COOL MODE automatically adjusts cooling temperature】The cooling temperature is automatically adjusted according to your activity, environment, and personal preferences set in the app beforehand. The newly equipped temperature and humidity sensors on the main unit can detect increases in humidity due to sweat, further evolving the SMART COOL MODE. Additionally, by linking with the separately sold REON POCKET TAG (RNPT-1) (※1), a new function, SMART COOL⇔WARM MODE, which automatically switches between COOL and WARM, can also be used. (※2) For example, it automatically adjusts to environmental changes not only in summer but also during the transitional seasons when it can be both cold and hot throughout the day. ※1 REON POCKET TAG (RNPT-1) can be purchased as part of the REON POCKET 4 Sensing Kit (RNPK-4T) or separately. It is not included in this product (RNPK-4). ※2 RNP-4 alone only supports SMART COOL MODE (cooling). 【Neckband 3 pursuing a perfect fit】The included dedicated neckband can be adjusted to fit the size and angle of your neck. This ensures that the cooling/warming surface of REON POCKET makes firm contact and provides a stable fit that prevents the main unit from shifting even when you move. It widely supports individuals with neck circumferences from 34cm to 46cm. The newly designed band has a structure that combines flexible adjustability with the holding power to keep it securely in place. The adjustable mechanical flexible tube, the wire frame that maintains its shape, and the silicone rubber covering them provide a gentle touch that feels natural even when worn for long periods. Even when wearing collared clothing, using the included airflow parts promotes effective heat dissipation and makes exhaust air less noticeable.