Features The signal generator supports multiple adjustable modes including PWM mode, pulse mode, signal source mode, sine wave mode. Hand-held signal generator is easy to carry, easy to operate and practical. Built-in 1000mAH, 3.7V rechargeable polymer lithium battery, it can work continuously for 8 hours after the battery is fully charged. The voltage, frequency and duty cycle are all adjustable at PWM mode, with a high accuracy of 0.1%. Frequency of sine wave and triangular wave can be adjusted in a wide range. Specification:Item Type: Signal Generator Power Supply Voltage: USB 5V Product Function: PWM mode, pulse mode, signal source mode, sine wave mode PWM Mode: Voltage, frequency, duty cycle are adjustable, frequency accuracy of 0.1%; voltage range: 1-24v, frequency range: 1-150khz, duty cycle range: 0-100% Pulse Mode: Initial delay time t0: 0-60s, high level time t1: 0-60s, low level time t2: 0-60s, pulse number p-n: 1-99999999, resolution: 0.001 s Signal Source Mode: Voltage source 2-10V adjustable, current source 4-20mA adjustable Sine Wave Mode: 1-999999HZ adjustable (triangular wave adjustable range is the same) Signal Load Capacity: Output current maximum 20mA (Note: This product is output is a signal source, can not directly drive high-power load) Environment Temperature: -10 ~ +70℃ Size(LxWxH): 92 x 70 x 28mm / 3.6 x 2.8 x 1.1in Built-in Battery: 3.7V polymer lithium battery, 1000mAH Package List:1 x Signal Generator 1 x USB Charging Cable 1 x Banana to Crocodile Clip 2P Red Black Cable  Package List 1 x Signal Generator 1 x USB Charging Cable 1 x Banana to Crocodile Clip 2P Red Black Cable