Features Waterproof Design For All Environments: Resistant to water, this battery monitor ensures stable performance even in challenging outdoor conditions Lightweight and Portable Convenience: Compact and easy to carry, this battery voltage meter allows for quick installation and effortless mobility Multifunctional Display Options: Easily switch between voltage readings and battery percentage with a single button, plus features like backlight and sleep mode Enhanced Safety Features: Equipped with reverse connection protection, this battery monitoring device prevents damage from incorrect wiring for secure usage Simple Installation With ABS Housing: Constructed from durable ABS material, this battery indicator includes a built-in 30cm power cord for straightforward connections and operations Features: 1、Good Features: This digital oscilloscope comes with 2.5MHz sampling rate as well as 500KHz analog bandwidth and 200KHz actual bandwidth. 2、Clear Display: Can test sine wave, square wave, half wave, etc., the oscilloscope also has 2.4in TFT display with 320 x 240 resolution. 3、Fast : Supports one button AUTO an completed trigger function for periodic analog signal or non periodic digital signal. 4、Broad Utility: Can be broadly used in automobile maintenance, home appliance maintenance, teaching, scientific research and other fields. 5、Easy Carrying: Light in weight and compact in size, the handheld oscilloscope can be easily carried for both indoor and outdoor working. Specification: Item Type: Digital Oscilloscope Sampling Rate: 2.5MHz Analog Bandwidth: 500KHz Actual Bandwidth: 200KHz Measuring Range: X1/±40V, X10/±400V. Input Impedance: 1MΩ Storage Depth: 1Kb Parameter Type: 12 Pulse Width Modulation Output: 1K-80KHz frequency, 0-100.0% duty cycle, 3.3V voltage. Function: 17 waveforms. Output: 1-1KHz frequency, 0-3.3V voltage range. Display: 2.4in TFT 320 x 240 resolution. Charging Voltage: 5V Battery Capacity: 1 x 3.7V 600mAh battery, shipped with built in battery. Package List: 1 x Digital Oscilloscope 1 x Test Cable 1 x User Manual Package List 1 x Digital Oscilloscope 1 x Test Cable 1 x User Manual