Pluggable terminal blocks, safe and convenient wiring. 4-digit high digital tube, the display brightness is uniform and adjustable (1-8 brightness). Aluminum knob electroplated buttons, high quality film, charging battery 3 power supply methods: External power supply, DC5V micro-USB, bulit-in lithium battery(only if you choose rechargeable type can you have bulit-in lithium battery charging As long as all the way to work, can also be at the same . for DC 15-30V external power supply, which can share the 24V power supply of PLC and other equipment. Specifications: Micro-USB universal can be to recharger, computer USB port and so on. In the normal operation screen, save a and current value, cilck the to save, after releasing the OK button ,the screen displays"...", which means the save is successful. directly display the saved value, no need to adjust the parameters when you turn on the machine, which is very practical. Easy to carry and small size, the for on-site debugging. Charging method: bulit-in lithium battery(only rechargeable type), external power supply, DC5V micro-USB Battery: 1 * lithium battery, 3.7V, 1100mAh Item size: 89 x 69 x 28mm / 3.5 x 2.7 x 1.1inch Colour:black Material:ABS note:rechargeable battery include Package Contents: 1 * Current Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.