RSRP is the term for signal strength, measured in decibels milliwatts (dBm). This is effectively the power of the booster, and a higher value (closer to zero) means a stronger signal. An RSRP of -80 dBm or higher is generally considered strong signal.
SINR is the term for signal quality, and is measured in decibels (dB). Any SINR measurement over 5 dB is considered good, while a negative SINR means that you have a lot of interference on your signal. Importantly, the only way to improve signal quality is to use a highly directional antenna like our Grid Parabolic Antenna.