The AD1 boasts a 146 MHz ultrawide UHF bandwidth. Running for up to 8 hours on two AA batteries or up to 9 hours using an SB900A rechargeable battery (sold separately), it offers selectable RF output power levels (2/10/35mW) and transmits up to 330 feet. This version has a TA4M input, suitable for connecting either a lavalier, headset mic for hands-free activities or a special adapter cable for instruments (mic and cable not included). Encased in lightweight, moisture-resistant aluminum, the AD1 offers excellent audio and RF performance, secure AES 256-bit encryption, and versatile rechargeability, making it perfect for professional audio applications.