Valefod 3 Pack Lm2596 Dc To Dc Voltage Regulator 4 40V To 1.5 35V Buck Converter With Led Display Binoculars * Space-saving and wall-damage-free installation

* Space-saving and wall-damage-free installation with strong adhesive

and Samsung

3-Way Swivel Pan Head

Remote Mic

Even If You'Re Sitting In The Back Seat Of The Car

Valefod 3 Pack Lm2596 Dc To Dc Voltage Regulator 4 40V To 1.5 35V Buck Converter With Led Display Binoculars * Space-saving and wall-damage-free installationFeatures: Dc Dc Step Down Module Thickened Circuit Boards Advanced Solid State Capacitor Short Circuit And Over Temperature Protection 100% Tested, Sealed In Anti Static Packaging Kindly Note: 1. Input Voltage Must Be 1. 5 V Higher Than The Output Voltage, No Boost 2. Do Not Reverse The Input And Output Interface 3. Keep Output Under 2A (Or 15W), And Use A Heat Sink When For A Long Time Working How To Calibrate The Digital Tube Voltmeter (Optional