Specification: Item Type: Electronic Tension Calibrator Weight: Approx.134g / 4.7oz Material: ABS Battery: 2pcs AAA 1.5V Batteries (Batteries Not Included) Color: Black Package List: 1 x Tension Calibrator   1 x Manual Note: 1. Please hold the lifting ring or add auxiliary tools to the lifting ring side weight. Do not hold the side weight of the shell, otherwise it will lead to excessive error in the weight measurement. 2. Violent collision and impact should be avoided as far as possible. 3. Hand held tension calibrator shell adopts ABS engineering plastic, cleaning please use soft cloth with water or detergent wipe, strictly understand the use of benzene, nitro solvents, caustic soda liquid lamp corrosive substances for cleaning. 4. If the sign of low power is displayed, please replace the battery in time. If the electronic weighing device is not used for a long time, take out the battery to avoid damage to the circuit due to battery leakage. 5. When used to determine the weight of the tension calibrator, because the tension of the wire is changing in the determination process, it needs to be measured for many times to take its average value, the average value is the final pound of the tension calibrator. 6.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.