Features：
1. Life size, each step of cathet erization can be practiced
2. Precise anatomical structure, convenient observation through transparent shell
3. Lifelike appearance, urethral canal length 3-5cm
4. when the catheter reached the internal urethral orifice, the yellow light flashing and with buzz sound
5. When the catheter reached the urinary bladder, the green light flashing and with buzz sound. “Urine” flow out after catheter successfully enter bladder
6. Bladder irrigation