MOKI ACC HPCAMB BLUE CAMO HEADPHONES WITH IN LINE MIC

I purchased this for my brother who became unable to hear on his previous phone which had a 3 step loudness adjustment. Now he hears every time and there is still room for more adjustment. I am especially impressed with the quality of the sound when amplified, both incoming and outgoing. Others have commented on the good quality of the outgoing sound. The broad range of adjustment is good for both voice and the ringer. The adjustment for tone is also helpful for hearing. We just have basic phone service and have not tried other features.