An EMG detector is a device from Seeed Studio that enables users to detect electromyography (EMG) signals from muscles and nerves. It can be used for medical research, motion control, or for bio-sensing applications. The EMG detector consists of two components: the EMG Sensor Board and the detector head. The EMG Sensor Board is a two-channel differential amplifier and has a wide dynamic range, adjustable frequency, and adjustable gain. This board is connected to the detector head through a 20-pin header. The detector head contains a number of connections, including an analog input, I2C communications, and power supply. It also features a 5V output and power indicator LED, which help to easily indicate proper connections and supply.