B4 Pen-Type Visual Fault Locator Laser Adjustable Power for Fiber Optic Testing, 3-Level Output

Adjustable 3 level output power: 5mW / 10mW / 15mW; 5mW / 10mW / 20mW; or 10mW / 20mW / 30mW, based on your testing applications.
Compact pen-type design makes it easy to carry around and operate with one hand.
Lithium battery with 10 hours of runtime before charging is needed.
Quick USB charging, can be charged from a power bank, USB from computer or USB adapter.
Replaceable ceramic core, helps product last longer and affordable updates.
Memory function – last used power option after turn-off.
Universal 2.5mm adapter fits fiber optic connectors.
Durably built to work in -20°C to +60°C.
Fast, 650nm visible red laser for quick and accurate fault locating.
Clear gear display for power selection.
Lightweight(81g) , comfortable for daily use.
Multiple charging options.

Price range: $12.00 through $22.00

Model	B4-05 Pen-Type Visual Fault Locator
Output Power Options	≥5mW / ≥15mW / ≥20mW / ≥30mW
Power Levels (Adjustable)	3-level (except 5mW model: fixed output)
Power Level Range (B415)	5mW / 10mW / 15mW
Power Level Range (B420)	5mW / 10mW / 20mW
Power Level Range (B430)	10mW / 20mW / 30mW
Output Wavelength	650nm
Working Current	≤40mA (5mW), ≤150mA (15mW), ≤160mA (20mW), ≤170mA (30mW)
Battery Type	Rechargeable lithium battery
Battery Life	>10h (5mW), >3.5h (15mW), >5h (20mW/30mW)
Charging Time	<3h (5mW), <5h (15mW/20mW/30mW)
Charging Current	≤300mA
Charging Voltage	5V (USB charging supported)
Standby Current	≤15uA
Memory Function	Remembers last used power setting
Replaceable Ceramic Core	Yes, user-replaceable
Output Mode	3-level adjustable (except 5mW model)
Interface Type	2.5mm universal adapter
Compatible Connectors	SC, FC, ST (via 2.5mm adapter)
Operating Temperature	-20°C ~ +60°C (non-condensing)
Storage Temperature	-40°C ~ +85°C
Product Dimensions	127mm × 45mm × 20mm
Package Dimensions	150mm × 62mm × 40mm
Net Weight	81g
Visible Fault Location	Yes, visible red laser for fiber break detection
Multi-Mode Charging	Power bank, computer, USB charger, etc.
Gear Indicator	Clear display for output power level
Energy Saving	Adjustable output for efficient power use
Rugged Design	Durable, portable, ergonomic
Safety Warning	Laser safety reminder for eye protection
Application	Fiber optic testing, maintenance, troubleshooting