| Model | B3S05 (Dry Battery), B3S05 (Li-ion), B3S15, B3S20, B3S30 Fiber Optic Light Tester |
| Output Power | >5mW (B3S05), >15mW (B3S15), >20mW (B3S20), >30mW (B3S30) |
| Output Wavelength | 650nm |
| Battery Capacity | 2 x AAA (B3S05 Dry), Li-ion (B3S05 Li), 600mAh (B3S15), 900mAh (B3S20/30) |
| Battery Life | >10h (B3S05), >3.5h (B3S15), >5h (B3S20/30) |
| Charging Time | Not rechargeable (Dry), ≤3h (Li-ion/B3S15), ≤5h (B3S20/30) |
| Charging Voltage | 5V |
| Standby Current | <300mA |
| Interface Type | Universal 2.5mm adapter, compatible with SC, FC, ST connectors |
| Product Dimensions | 125 x 35 x 17 mm |
| Net Weight | 56g |
| Gross Weight | 83g |
| Real-Time Battery Display | Four-level LED indicator: 100%, 75%, 50%, 25% |
| Brightness Adjustment | 3 levels: Strong, Medium, Weak |
| USB Charging | Supported (except dry battery model) |
| Ergonomic Design | Comfortable grip for extended use |
| Smart Chip | High-quality integrated chip for stable, powerful output |
| Portability | Compact, lightweight, easy to carry and store |
| LED Illumination | Built-in LED light for auxiliary lighting |
| Spare Ceramic Ferrule | Includes backup ceramic core for easy replacement |
| Power Indicator | LED indicator for battery and working status |
| Operation Button | Fn button for power and mode, LED button for illumination |
| Fault Detection Modes | Constant and flashing red light |
| Material | Durable, robust construction |
| Application | Fiber optic testing, maintenance, engineering, construction |
| Enhanced Penetration | High-transmittance red light, strong penetration, stable performance |
| Multi-Power Selection | Output power selectable from 5mW to 30mW |
| Human-Centered Design | Designed for ease of use and comfort |
| Universal Compatibility | Works with multiple fiber connector types |
| Accessory | Comes with spare ceramic ferrule and protective cap |
| LED Status Indicators | Separate indicators for power, mode, and battery |
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