Main Specifications Body material metal oscillation mode PLL circuit carrier frequency UHF 620 ~ 934MHz frequency bandwidth to ACT feature automatically sync with the receiver bandwidth frequency adjustment ACT automatically lock the work channel output power 30mW (may be changed in accordance with local radio regulations) harmonic radiation Maximum input sound pressure 140dB SPL operation has LCD display shows battery capacity, channel and error messages with optional sound head module can be arbitrarily switched capacitor pure and moving coil sound head using the 5th (AA) Battery two dimensions 50Φ × 253 (length) Weight Approx. 301 (without battery) has a number of patents and patent certification, multi-national radio regulations Certification Remark 1. the specifications are subject to error, the actual product is based on 2 carrier frequency range, maximum deviation, high frequency output power and harmonic radiation in accordance with national radio regulations as the basis