B0200/B0202 Alnico Square B0200Dia: 50mm, Height: 19mmOutput: nom .2 watt and max .4 wattFrequency range: 430-4000 HzNet weight: 40g Alnico Square B0202Dia: 66 mm, Height: 21mmOutput: nom .3 watt and max .5 wattFrequency range: 350-4000 HzNet weight: 50g