High-concerned chemical: None Size: OLED display Type: 200Hz-100MHz RF Frequency METER Model Number: PLJ-091OLED-L1 Frequency Counter DIY Supplies: Electrical The PLJ-091OLED-L1 is a high-performance pen-style frequency counter featuring an OLED display. Compact and portable, it is designed for precision frequency measurement applications such as testing crystal oscillator accuracy in microcontroller systems and evaluating communication port timing reliability. Key Features Core Technology: Sanjian Studio SJ8K24P-T dedicated chip (100MHz capacity) Premium Build: Acrylic housing + 0.91" blue OLED display High-Precision Reference: KDS VC-TCXO (±2.5ppm stability) Advanced Algorithm: Unique gate control with precision timing (non-interrupt driven) Dual Gate Times: 0.1s/1.0s selectable (10Hz/1Hz resolution) Smart Display Modes: MHz/kHz/Hz unit switching for optimal readability Dual Input Methods: Signal probe needle or IPEX port (high sensitivity) Type-C Powered: 5V operation with low current consumption Auto Memory: Settings preserved after power cycle Technical Specifications Operation Guide Gate Time Selection: Press button to toggle between 0.1s (faster refresh) and 1.0s (higher accuracy) Unit Display: Cycle through MHz/kHz/Hz modes for best reading format Note: Signals >100MHz show truncated display in MHz/kHz modes - use Hz mode for full resolution Color: As Shown Material: Acrylic Package Contents: 1*pcs PLJ-091OLED-L1 Pen-Style Frequency Counter