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Specifications: Material: PCB + Electronic Components Color: black,blue,green,Random Color Display: Digital Working Voltage: 3V Power Supply: CR2025 button battery (not included) Clock Regulating Mode: Button adjustment Display Mode: Red LED digital tube display Energy Saving: Light for 5 seconds then change to power saving mode automatically Package List: 1 * Electronic Watch DIY Kit (Battery Not Included) If for whatever reason, you decide you are not satisfied. You can easily and quickly contact our helpful customer support and get an easy refund.