Sound level meter, Radio Shack model 33-2050. Used but in good working condition. 7 sound level ranges, 50-126 dB. A and C weightings, and slow and fast response modes for measuring average and peak levels. Has phono-type jack for connection to other test equipment. Tripod mountable. Uses one 9v battery. A letter "M" is scratched on the front surface (my name is Marty). Includes case and original manual. $12 extra for shipping to US address.