12 DC core vibration motors: rated voltage: DC 3V (voltage range 1-6V) rated speed: 16000 RPM (speed range 8000-20000rpm) waterproof vibration motor size: 7 x 25 mm Small waterproof and mute motor: The shell material is made of high -quality sealing stainless steel. All motion components are protected in the shell. The wires are fixed with epoxy resin to prevent liquid invasion, high waterproof, resistance, strong vibration, low noise, low noise Struly running hollow motor structure: stable performance, fast and , high output torque, high -speed, high -energy conversion performance The purpose of vibration motor: DIY handmade projects, such as bristles, experimental robots, classroom experimental projects, etc.Various electronic vibration equipment, such as: vibration massage instruments, electric toothbrushes, etc. Vibration motor warning: Please read the instructions of the motor carefully and use it in the correct way; the parts are small to prevent children from accidentally eating color: Silver Material: Aluminum alloy Package Contents: 2 set x vibration motor 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.