Edan SE-1515 Stress Test ECG  9/12/15/16/18-lead ECG configurable Long time sampling up to 30 minutes DE18 sampling box with convenient sampling button and signal quality indicator Enhanced powerful technical specifications provides reliable signal quality  Lead reversal function to easily rectify wrong placement of electrodes Event marker enables you to take notes anytime during sampling Reports comparison provides you an easy way of comparing ECG traces Stress test function (Optional) Built-in Glasgow Algorithm Flexible sampling box configuration: DX12: Handy 12-lead Wireless sampling box (Optional) DP12: Cost-effective 12-lead Wired Sampling box (Optional) DE18: 18-lead Wired sampling box, providing 9/12/15/16/18-lead ECG test (Optional)