BeachTek SVU-2 Compact Multi-Purpose Stereo VU Meter, Tripod Thread Mounted Audio Meter

See Recording Levels for Optimum Sound Quality
Easily Check for Overloads to Prevent Distortion
Bright Easy to Read Display
High Powered Headphone Amp and Volume Control
Ideal for Any Camcorder or Audio Recording Device
SVU-2 Features
Calibrated display allows you to see recording levels for reliable sound quality every time
Tri-Colour LED bar-graph lets you quickly check for overloads
Built in high powered headphone amplifier with volume control
Mounts securely to camera and tripod
Compact and lightweight for ease of use
Uses one standard 9 volt battery
LED battery indicator