HT Instruments HT8051:

A compact and versatile digital multimeter with True RMS measurement, IP67 waterproof and dustproof rating, and a large backlit display for easy readability in all conditions. Its unique selling points include:

True RMS measurement for accurate readings of AC signals
IP67 waterproof and dustproof rating for use in harsh environments
Large backlit display for easy readability
Auto-ranging and auto-power-off for ease of use
* Compact and lightweight design for portability