Feature 1, LED display, hanging neck/handheld/desktop, 2, 5 speed wind adjustment, 90° adjustable, 3, Dual batteries for long battery life, can support mobile phones. Specification Material: ABS+PP+electronic components Single net weight: 175g Product size: 18.8*9*4.65cm/7.4*3.54*1.83in Input voltage: DC5V Battery capacity: 1800mA Battery voltage: 3.7V Use time: about 3.5-7 hours