Bone Conduction Module Sensor Deafness Dumb Mini Bone Conduction Horn Speaker Description:Bone Conduction Module/Bone Conduction Sensor/Minimum Bone Conduction Horn for Deafness Supply Package Included:1 * Bone Conduction Module Sensor Specifications:GD01:Dimensions: 21.5*14*7.9mm Nominal Power Input 1.5W, Maximum Input 3W Average Voltage: 3.7 VDow Function (Max) :12 VImpedance Nominal: 4.5Omega; 15% test at 200Hz 3V Resonance Frequency: 300-19000HZ Sound Pressure Range (Minutes): for decibels 88-1kHzCurrent Consumption (maximum): 600Z Distortion: 5% less Operating Temperature: -20 - 60C Storage Temperature: -30 - +70C GD02Dimensions Dimensions: 12.6*6*4mm Rated Power: Nominal Power Input 1W, Maximum Power Input 2W Average Operating Voltage: 3.7 V Operating Voltage (Max): 8 VCelectrical Characteristics: Electrical SpecificationNominal Impedance nominal impedance 8Omega; 15% test at 200Hz 3 vResonance frequency: 300-19000Hz Sound pressure level (minutes): for decibels 88-1kHzCurrent consumption (max) :300 mA Distortion: 5% less Operating temperature: -20 to 60 C Storage temperature: -30 to +70 C GD05 Dimensions diameter: 16.8*6.8mm Rated power: nominal power input 1W, maximum power maximum input 2W Average operating voltage: 3.7 V Operating voltage (max): 8 VCelectrical characteristics: electrical specificationNominal impedance nominal impedance 8Omega; 15% test at 200Hz 3vResonance frequency: 300-19000HzSound pressure level (minutes): for decibels 88-1kHzCurrent consumption (max) :300 mAZdistortion: 5% lessOperating temperature: -20 to 60 degrees CelsiusStorage temperature: -30 to +70C