EDR (Enhanced Data Rate) - definition
EDR stands for Enhanced Data Rate (introduced back in 2004) is a feature which comes from BlueTooth 2.0. Basically it is a faster PSK (Phase-shift keying) modulation which provides 2-3x faster data transmission in BlueTooth connectivity. It is mentioned as BlueTooth 2.0 + EDR or BlueTooth 2.1 + EDR. Not all BlueTooth 2.0 or 2.1 or later supports EDR feature, it depends on the specific profile of each devices. It also reduces the power consumption at the same time.