Item Type: Phone Clip Cooler Overall Size: Approx. 8 x 4.5 x 2.8cm / 3.15 x 1.77 x 1.1in Continuous Use: About 2.8 to 3 hours Battery: Lithium battery 250mAh (Shipping with built in battery) 1Rapid Cooling: The cooler has strong performance, rapid cooling and fast heat dissipation, which can be achieved under normal operation and use for a long term. 2Compact Appearance: This cooler is compact and light in weight, so it will not block your hand from operating on your phone during your use. 3Low Noise Operation: This cooler can do without disturbing people talking, inverter direct current motor, stable wind without jittering, and low noise operation while the fan rotates at high speed. 4Long Usage Timing: This cooler can be applied for a long timing after one charge, and can be applied continuously for about 2.8 to 3 hours, giving you an extremely high usage experience. 59 Blades Fan: This cooler has a 9 blades fan with powerful cooling outlet technology to quickly evacuate heat from the phone up to 5000R/min.1 x Phone Clip Cooler 1 x USB Cable