The TR10 (single channel) and TR20 (dual channel) are home/clinic EMG units featuring continuous operation or work/rest prompts and LED visual displays. Goal types include: Above Tone, Below Tone and Matrixed Audio Tone and A/B Ratio for Dual Channel Systems. 9-volt battery and carry case included. Additional features of the TR10C and TR20C are auto-lock for unsupervised patient use; automatic data storage; computer output; and Pathway Utilities/ Compliance Software for data download only.