Design and Assembly of the Wireless Swimming Device: A lithium ion polymer battery (FCONEGY 11.1 V 3S 7000mAh 40 C Lipo RC Rechargeable Battery), a wireless Wi-Fi module with a camera (CANADUINO ESP32-CAM Wi-Fi Bluetooth Module with 2MP Camera), a voltage limiter (KeeYees MP1584EN Mini Step Down Buck Converter Adjustable DC to DC 4.5-28 V to 0.8-20 V Voltage Regulator Module) and four electronic switches (Mosfet Driver Module Dual High-Power 0-20 kHz FET PWM Trigger Switch Driver Module DC 5 V-36 V 15 A) were purchased from Amazon. One outlet from the battery was connected with the voltage limiter and then connected to the wireless Wi-Fi module. The Wi-Fi module was then connected to four electronic switches which are also powered directly by the battery through the second outlet. The electronic switches had wires to connect with the four pieces of Nitinol wires. The Wi-Fi module was programmed using Spyder 4.2.5 on Anacond-Navigator (Figure S10).