Raider RD-GPS01 User Manual page 17

Equivalent vibration level ah (K = 1.5 m / s²)
Sound pressure level LpA (K = 3 dB (A))
Measured sound power level LwA
Do not touch solid objects.
Keep at least 15m from other people.
Guaranteed sound power level.
Mixing Ratio Gasoline/Two-cycle oil: 25:1.
m/s² 6.303
dB(A) 77.5
108.2
dB(A)
17