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                                        120/150/250/300/400/600/1200/1500W DC-DC Step-up Step-down Module$1.00 - 
                                    
                                        
                                        1 Channel 5V/12V Relay with Indicator Light$0.26 - 
                                    
                                        
                                        CDMA/GPRS/GSM/LTE/3G/4G SMA Inner Needle Receiving and Transmitting Antenna$1.08 - 
                                    
                                        
                                        5V 12V 24V High and low Level Trigger Delay Relay Module$3.24 - 
                                    
                                        
                                        DFRobot Micro:bit Motor Driven Expansion Board$9.99 
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