Hand held red light therapy of 808 nm can penetrate deeper pain areas, relieve muscle stiffness and soft tissue pain. 808nm can penetrate deep tissues and relieve joint pain in the neck, elbows, arms, back, knees and other areas. (8080nm can't be seen when it's working which is normal)
This therapy machine for body integrates pulse modes with red and infrared light modes.
Built in battery, rechargeable and noiseless, and you will not experience a vibration with the handheld red light therapy device.