Technical Specification
| MODEL | ST-40 |
| Chestpiece Material | Zinc alloy |
| Diapharm | Prominent |
| Chestpiece Diameter | 32&45.5mm |
| Height | 34mm |
| Chestpiece Laser | Optional |
| Y tube material | PVC |
| Y tube Type | DUAL |
| Y tube Length | 550mm |
| Y tube color | colorful |
| Binaural Material | Aluminum |
| Binaural Spring | Outside |
| Eartip | Soft |
| Accessories box | – |
| color box | prominent |
| Packing | 1pc/box 50pcs/carton |
| Carton Weight | 15.5KGS |
| Carton Size | 67.5*31*42.5cm |