This product is a frequency , made of solid materials, safe and durable. It can last for a long time without being easily . The product is an excellent frequency that can bring you more convenience, allowing you to have a more comfortable experience. Features -Color:Black -Material:Plastic -Size:7.80X4.20X4.00cm/3.07X1.65X1.57in Working voltage: 3.3-3V Frequency range: 1Hz-150kHz(normal mode), 1Hz-15kHz(refine mode) Frequency accuracy: 2% load ability: 5-30mA Output range:PWM amplitude to powering voltage -The adjustable pwm pulse frequency and duty cycle feature allows for versatile applications, making it suitable for a wide range of uses. -The square and rectangular waveforms provide flexibility in generation, allowing for and precision in output. -The convenient design makes operation and control of the module easy and user-friendly. -The high precision output and strong stability allows for accurate and consistent signals, making it reliable for professional use. -The simple and user-friendly design caters to both beginners and professionals, making it accessible to a wide range of users. Package list: 1 x frequency