-138 PRO is a highly practical and cost-effective MINI handheld oscilloscope launched by , which is aimed at the maintenance industry and the education industry. The oscilloscope has a real-time sampling rate of 2.5MS/s and a 200KHz bandwidth. With full trigger function (single, normal, automatic), Works perfectly for both periodic analog signals and aperiodic digital signals. Voltages up to 400V can be measured. Equipped with efficient one-key AUTO, the measured waveform can be displayed without cumbersome adjustment. The display is equipped with a 2.4-inch high-definition LCD screen with a resolution of 320 x 240. Built-in 1000mah high-quality lithium battery, a full charge can be used continuously for about 5 hours. : ELECTRICAL Model Number: -138 PRO IS Battery Demountable: Yes Type: B color:As shown Material:plastic+metal Package Contents: 1 x Handheld Digital Oscilloscope Kit(Without Battery,With Probe)(Tag Random, cannot choose the specified tag) 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.