Mini Pedal Tuner Effect Pedals 436Hz445Hz with Hook Loop Fastener for Electronic Equipments Feature: 1. Dual LED Display: The pedal tuner has high definition dual LED display, and the pitch indicator can be selected. 2. High Accuracy: Adjustable A4 value range is 436Hz445Hz, with outstanding tuning response speed and high accuracy. 3. Bypass Switch: Can switch between true bypass and buffer bypass easily according to preferences or actual needs. 4. Metal Material: Made of excellent metal material, high hardness and wear resistance, can be used for a long time. 5. Compact Size: The pedal tuner has a small and compact structure and does not take up space for installation, used for electric guitars, etc. Specification: Item Type: Mini Pedal Tuner Material: Metal Color: Beige Product Applicable Power Supply: External 9V AC power adapter, internal negative and external positive (not included) Width: Approx.4cm / 1.6in Length: Approx.9cm / 3.5in Package List: 1 x Tuner 1 x User Manual 1 x Hook Loop Fastener 1 x Sponge Note: Before playing or practicing, you need to tune your instrument.