Features Moisture- proof and dust-proof designed function Adopts ABS material to firm the body, more comfortable to hold grab handle according to somatology Simple and convenient buttons, easy to operate 3.7v supply voltage, with rechargeable battery, safe, stable durable and long operation... Features Moisture- proof and dust-proof designed function Adopts ABS material to firm the body, more comfortable to hold grab handle according to somatology Simple and convenient buttons, easy to operate 3.7v supply voltage, with rechargeable battery, safe, stable durable and long operation life. Original imported high quality big power recording chip and high quality electronic components 120 seconds long and high definition recording with plentiful music and siren sound source