GD01: Dimensions: 21.5*14*7.9mm Power Nominal input 1.5W, Maximum input 3W Average voltage :3.7 V Operate (Max) :12 V Nominal Impedance :4.5Ω±15% test @200Hz 3 v Resonance frequency :300-19000HZ Sound pressure level (minutes) :In the case of 88-1kHz decibels Current consumption (maximum): 600MA Distortion :5% less Operating temperature :-20---60° C Storage temperature: -30---+70 ° C GD02 Dimensions Dimensions: 12.6*6*4 mm Power rated :power Nominal input 1 W, maximum power Maximum input 2W Average operating voltage: 3.7 V Operating voltage (max): 8 V Electrical Characteristics: Electrical specification Nominal Impedance Nominal Impedance 8Ω±15% test @200Hz 3 v Resonance frequency :300-19000 Hz Sound pressure level (minutes) :in the case of 88-1kHz decibels Current consumption (max) :300 mA Distortion rate Distortion :5% less Working temperature: -20 to 60 ° C Storage temperature :-30 to +70 ° C GD05 Dimensions Diameter: 16.8*6.8 mm Power rated:power Nominal input 1W, maximum power Maximum input 2W Average operating voltage :3.7 V Operating voltage (max): 8 V GD08 GD12 GD18