B+K Precision's model 2121 is a dual trace oscilloscope with a built in 50MHz Frequency Counter that offers high performance at a low price. Most competitor's entry level oscilloscopes have a 20 MHz bandwidth, while B+K Precision's models 2121 has a bandwidth of 30 MHz. This oscilloscope is built by and backed by B+K Precision, a company that has been selling reliable, durable, value priced test instruments for over 50 years.