The SK 5212 is the distillation of the latest technology arising from Sennheiser's experience in RF transmission. It combines a maximum in reliability and versatility in a very small housing. The small size makes the SK 5212 comfortable to wear and hide. The transmission power can be adjusted in two steps to reach the optimum transmission performance while meeting regional regulations. An enormous range of input sensitivity from -30 dB to + 40 dB makes the transmitter most flexible to be used in quiet interview situations as well as with very powerful singers in musicals. The bodypack transmitter convinces with very robust mechanics, a high frequency agility and an intuitive menu driven operation with a backlit LC- display. The SK 5212 reaches an operating time of 5 1/2 hours with only one AA Alkaline battery.