COMPCOOLER Backpack ICE Water Hydration Cooling System Flow Control Model No.: COMP-BPHC-7440-NF Operation Manual for Backpack ICE Water Cooling System Operation Manual for Hydration Bladder Compcooler Backpack ICE Water Hydration Cooling System (BPHC) with 4.0L dual chambers detachable bladder provide 3-5 hours body cooling and hydration after ICE melt. Compcooler Backpack ICE Water Hydration Cooling System (BPHC) is made up of Backpack ice water circulation Unit and Mesh Liquid Cooling Vest. BPHC circulates the cold water from frozen bladder to cooling channel embedded on the mesh vest liner and continuously flow around your body, it keeps user cool and comfortable in hot conditions. 4.0 L Dual Chambers bladder provides cold water hydration after ICE melt. Key Features Long cooling time by 4.0L dual chambers bladder, easy to extend cooling time by replace the frozen bladder. Mesh Liquid cooling vest with better skin cool feeling and air permeability, body fit design with sides adjustable device. Well-distributed Liquid Cooling Channel, Evenly Body Cooling. Two sets quick fittings support cool and cold mode, Hydration is available after ICE melt Clean ICE Water Circulation for Body Cooling, 100% Safe Physical Cooling, Friendly and Environmentally. Backpack ICE Water Circulation Unit Specifications Backpack: Black Oxford with reflective insulation material Bladder: 4.0L Dual Chambers Hydration Bladder Pump: 7.4V diaphragm pump Connector: CPC female Quick fitting Pump: ON/OFF control mode Water flow: 500ml/min Battery: 7.4V 2200mAh rechargeable Li-Ion battery Noise: 45dBA Dry weight: 1KG Liquid Cooling Vest Specifications Material: Soft Stretch Mesh Color: Olive Outer and black liner Cooling Channel: Silicon micro tubing Zipper: YKK reversible zipper Adjustable device: stretch body fit strap Fitting: CPC male quick fitting Dry weight: 0.5kg Size: XS/S, M/L, XL/2XL, 3XL/4XL Cooling performance: Cooling time: 3-5 hours by 4.0L frozen bladder, 2-3 hours by ICE Cubes Temperature Range: 46℉-68℉ Battery Operated: 8 hours Operation Ambient: 0℃-60℃ (32℉-140℉) Garment Size: Item XS/S M/L XL/XXL 3XL/4XL Chest 84cm/33.1” 100cm/39.4” 108cm/42.5” 126cm/49.6” Length 64cm/25.2” 68cm/26.8” 70cm/27.6” 73cm/28.8” Note: Garment size has 30% expansion by stretch fabric (10cm/4”Max) or adjustable device (15cm/6” Max), a little stretch provides better cooling performance.