Ultra Thin Lithium Battery Wallet Finder Card 0.76mm Bluetooth Anti Lost Device
                                         
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                                            ... ultra-thin lithium batteries, reusable, low power consumption. The Bluetooth 4.0 anti-lender is based on the GB2540 module design. GB254X is a high-performance, ultra-low power consumption (Bluetooth Low Energy) radio frequency transceiver system module,...                                         
                                        
                                            SHENZHEN HEYANG SMART CARD TECHNOLOGY CO., LTD
                                         
                                        
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