1.Charging and power supply voltage: USB 5V (built-in battery can work continuously for 8 hours when fully , battery capacity 1000mAh) 2.Product functions: PWM mode, pulse mode, signal source mode, sine wave mode 3.PWM mode: voltage, frequency, duty cycle are all adjustable, frequency accuracy up to 0.1%; voltage range: 1-24V, frequency range: 1Hz-150KHz, duty cycle range: 0.1-100% 4.Pulse mode: start delay time T0: 0.001-60S, high level time T1: 0.001-6 0S, low level time T2: 0.001-60S, number of pulses P-N: 1-99999999, resolution: 0.001S 5.Signal source mode: voltage source 0-10V adjustable, current source 0-20mA adjustable<br><br>Sine wave mode: 1-999999HZ adjustable (same adjustable range of triangle wave) Signal load capacity: maximum output current 20mA (Note: this product outputs a signal source and cannot directly drive a high-power load) Ambient temperature: -10℃-+70℃ Color: Black Material: plastic<br><br>Package Contents: 1 set x Handheld Signal Generator<br><br>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.