Ambient ASF-2 MKII, Underwater Microphone, Small hydrophone, For high-quality underwater audio recordings, Polar pattern: Omnidirectional, Frequency range: 70 - 20,000 Hz, Total harmonic distortion: 0.1% (70 - 20,0000 Hz), Power consumption: 5 mA, Material: anodised saltwater-resistant aluminium, Capsule material: specially formulated NBR, Requires 48V phantom power, Cable length / max. depth: 10 m, Dimensions: (L x W x H) 47 x 30 x 30 mm (without cable), Weight: 50 g (without cable)