Check the listing for details. AKG DPT800 Digital Transmitter / Bodypack - Microphone Mic. Color: Black, Condition: Used. Listed at 379.99 USD. Came from a local university when they upgraded their equipment.....They have been tested and are working properly. Includes what is in the listing's pictures. The DPT800 reference digital wireless body-pack transmitter, for use with the DSR800 wireless receiver, provides an ultra-wide bandwidth of 150 MHz and a selectable radio output power of 10- 50mW (depending on frequency band). For convenience and versatility, the transmitter can be programmed remotely via infrared data transmission from the DSR800 receiver, and signal security is ensured through the use of 512-bit encryption technology. The DPT800 features an optional external mute/power switch that allows muting and on/off operation even when the transmitter is hard to access. The three-pin mini XLR audio input is compatible with any AKG lavalier and head-worn microphone and provides a bias voltage of 5V. General SpecificationsFinishBlack5 Carrier frequency range (country-dependent)Band 1 = 550.1 – 662.9 MHz ; Band 2 = 730.1 – 831.9 MHz Switching bandwidth≤ 150 MHz (country-dependent) Transmission power10, 20 mW (ERP max.), can be set via menu (country-dependent) Scatter≤ -70 dBc Antennaλ/4 antenna Audio input3‑pol. Mini‑XLR socket (3.0 Vrms max.) Audio input gain0 dB, +10 dB, +20 dB switchableOperating timeUp to 6.5 hours