-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.