Features：
1. Life size, each step of catheterization can be practiced
2. Precise anatomical structure, convenient observation through transparent shell
3. Lifelike appearance, urethral canal length 18-20cm.
4. When catheter passing pubic bone, red light flashing and with buzzing sound
5. When the catheter reached the internal urethral orifice, the yellow light flashing and with buzz sound.
6. After catheter enter urethra about 20cm and reach bladder, green light flashing and “urine” flow out from catheter
