Dumbbell

The dumbbell comprises a handheld assembly, at least two information labels, a trigger circuit assembly and an identification element, and the handheld assembly is configured to adjust the weight of the dumbbell by disassembling and assembling weight stacks; the at least two information labels are arranged on the handheld assembly and store different weight gear information of the dumbbell based on the number of the installed weight stacks; the trigger circuit assembly is configured to trigger an identification element arranged on the handheld assembly when the actual weight of the dumbbell adjusted by the handheld assembly is consistent with the weight gear information identified by any information label; the identification element is configured to read the weight gear information on the information label consistent with the actual weight of the dumbbell. Therefore, when the user adjusts the weight of the dumbbell, the actual weight of the dumbbell can be recognized by the recognition element, the step of ma