SAR stands for specific absorption rate, and is a measure of how much radiation is absorbed by the human body under the worst possible circumstances. Technically speaking, SAR is a measure of the rate at which radio frequency (RF) energy is absorbed by our body from an electronic device. The compliance standard that a device must meet is EN300328, which sets the maximum allowable level at 20mW.
Melomania 1 has a SAR rating of 2.01mW (3.03dBm), which is well below the maximum acceptable limit.