Peltier Cool Vest & Dedicated 40000mAh Battery

Unused item, only tried on and tested for operation.

Images 1-7 and the product description below (partially deleted due to character limit) are reproduced from the purchase source.

[Industry's Largest 150cm2 Round Cooling Plate, Body Temperature Up to -32℃, 1-Second Cooling] Features an industry-leading 150cm2 extra-large area Peltier element cooling plate. The latest round design of the Peltier vest fundamentally eliminates discomfort and poor fit caused by traditional angular edges. Experience an icy sensation that penetrates your entire body, like touching a chilled canned drink. Achieves an astonishing cooling power with a perceived temperature drop of up to -32℃.
[Japanese Design Rights Acquired, Neck & Both Sides Airflow, DC9V Powerful Fan] Achieves 3D circulation airflow and 3-point concentrated cooling! Not just cooling, but an innovative hybrid design of cold sensation + cool breeze! With a unique design that has obtained the latest Japanese design registration (design patent), dedicated exhaust air ducts are installed at the neck and both sides where heat tends to build up. The air drawn in by the DC9V powerful fan is transformed into icy cold air by the cooling plate and circulates within the garment through 3D circulation.
[40000mAh Ultra-Large Capacity, Up to 18 Hours Operation, 4-Level Adjustment] Includes a dedicated 40000mAh battery to support long workdays and outdoor activities. ●Cooling + Fan: Super Strong (5-7h) / Strong (6-8h) / Medium (7-9h) / Weak (8-10h). ●Peltier Only (Fan Disconnected): Super Strong (6-9h) / Strong (8-11h) / Medium (10-15h) / Weak (12-18h). ●4-Level Cooling: Super Strong (-32℃) / Strong (-28℃) / Medium (-21℃) / Weak (-17℃).
[Supreme Fit Through Scientific Placement & Ergonomic Weight Distribution] The placement of the cooling plate has been scientifically optimized based on thousands of verification tests and precise data calculations. The excellent, body-hugging fit ensures the plate stays in place even when moving, allowing cool air to be delivered directly to the skin at all times. Furthermore, the weight distribution design, considering front and back balance, significantly reduces strain on the shoulders.
[Silent Design, Active in Multiple Scenes] Equipped with a Japanese-made DC silent motor, operating noise is 30dB. Features a Peltier-only mode.
[Washable, Highly Breathable & Lightweight & Thin, Also Ideal as Innerwear] The cool vest body is made of high-quality, lightweight, and moisture-permeable material, and is hand washable after removing the cooling unit. The thin and elastic design allows it to be worn as innerwear under work clothes, suits, or air-conditioned workwear.