Thermoelectric Peltier Vest (Free Size) The item has been opened for testing. It has only been tried on a few times and is almost new and unused. ★Set Contents★ ・Vest ・Peltier devices x 3 ・Battery ・Controllers x 2 (for vest, for backpack) ・Backpack attachment ・USB charging cable (AC adapter sold separately) Professional specification! Peltier wear battery set ※ Continuous use: Approximately 8 hours maximum (when using the cooling fluctuation mode (strong)) ※ Surface temperature 7°C-23°C cooling (when the ambient temperature is set to 30°C. In strong mode) ・Powerful instant cooling: Equipped with 3 large 60mm Peltier devices ・For both cooling and heating: Active not only in summer but also in winter ・Free size: With size adjustment Velcro ・Bonus function: Attach to a backpack to cool the neck Use as a hand warmer in heating mode ◆Vest Body ・With battery storage pocket ・Size adjustment Velcro ・Breathable mesh fabric ・2-way stretch fabric ・With mounting holes that can also be installed on the back ・Peltier devices can be easily attached and detached with a half turn! ■Free Size: Suitable height 155~185cm, Suitable chest size 80~116cm ◆Peltier Devices ・Equipped with a fluctuation mode that operates for 10 minutes to maintain a cooling sensation and turns off the power for 2 minutes (operates similarly in heating mode from the perspective of low-temperature burns) ・Cooling plate temperature: Fluctuation strong…-23°C / Strong…-23°C / Medium…-18°C / Weak…-13°C ・Cooling operating time: Fluctuation strong…8 hours / Strong…7 hours / Medium…9 hours / Weak…12 hours ・Heating plate temperature: Fluctuation strong…49°C / Fluctuation weak…43°C ・Heating plate time: Fluctuation strong…17 hours / Fluctuation weak…25 hours ※ Temperatures and operating times vary depending on the environment ◆Battery ・PD battery that does not easily generate heat! ・When using a PD-compatible charger (sold separately), charging is completed in about 5 hours! ・Capacity: 3.7V/20,000mAh (74Wh) ・Rated capacity: 5V/12,200mAh (61Wh) ・Battery used: Rechargeable lithium ・Dimensions: H25 x W68 x D130 (mm) ・Weight: Approximately 340g ・Charging time (PD): Approximately 5 hours at 12V1.5A ・Charging time (normal): Approximately 9 hours at 5V2A ・Accessories: Charging cable Thank you for viewing.