9V Battery And Battery Buckle Snaps Deduction For Arduino 2560 \/ 2560R3 \/ UNO \/ UNO R3 Specification: Suitable for Arduino 2560 \/ 2560R3 \/ UNO \/ UNO R3 Material: ABS housing Dimensions: 1.89 x 1.02 x 0.63 inch (4.8 x 2.6 x 1.6 cm) Weight: 1.23 oz (35 g) Cable length: 7cm Package included: 1 x 9V battery 1 x 9V battery buckle