HY-10 is a complete hydrophone system. You only need a headphone with 3.5mm phone plug

Save 10$ and buy hydrophone and amplifier together!

Hydrophone specifications:

• Frequency range (-3dB) 20Hz to 20kHz
• Transducer Sensitivity[dB, re 1V/µPa] -170
• Maximum Operating Depth (tested) 3m
• Operating Temperature Range -15°C to +50°C
• Cable lenght 3 m (other lenghts on request)
• Nominal capacitance: 20nF (plus cable @ 118pF/m)
• Connector 3.5mm phono

Amplifier specifications:

• Color: Black
• Material: Steel
• Model: HY-11
• Size: 97x60x15mm
• Input/Output Port: 3.5mm Studio Input
• Lithium Battery Capacity: 2000mAh included
• Working Time: More Than 8 Hours
• Amp Internal Voltage: 8.3V/1A
• Output Power: 40mW @ 16Ω
• Adapted Headphone Impedance: 16-150Ω
• Low noise SNR:>100dB
• THD+N: 0.0003%
• Input impedance >= 2Mohm
• Pre Amplifier gain 20dB (10x) Application:
• Mammal whale Dolphin sound listening/recording
• Detect marine mammals for conservation & research
• Environmental science & research
• Kayaking
• Education
• Whale watching
• Eco tourism
• Climate research
• Fish farming
• and much more

Package include:

• Hydrophone amplifier HY-11
• Hydrophone with a cable HY-03
• USB cable to charge the amplifier