Signia Lotus Fun SP is a 6 channels Behind the Ear type volume controlled digital hearing aid by Signia. Fitting via the rocker switch. 4 preconfigured sound profiles 1 Touch. For Moderate to Severe Flat, Slight Slope and Sloping hearing loss. On and Off done through Battery Door, the optimal sound profile can easily selected and adjusted via the rocker switch. Gain 79dB Output 139dB. Noise reduction always on. Its other features includes :-Microphone -Picks up sound and improves speech understanding in noise.Rocker switch-Lets you set the suitable sound profile in the fitting process and wearers adjust the volume when necessary.Battery compartment-For size 675 battery in Fun SP.Earhook -Ergonomically formed for greater comfort and a high degree of amplification.Rugged and robust-Fun has been tried and tested in the most challenging environments ? for greater reliability.Comfort Coupling-This simple and reliable kind of sound transmission ensures optimum amplification for all levels of hearing loss.