Technical Pro Portable 75-Watt Megaphone Bullhorn Speaker w/ Siren and Detachable Microphone w/ Rechargeable Battery for The KTMPH50BLBAT is a high-powered megaphone great for any occasion. For convenience it features a wired microphone that can be attached to the back of the KTMPH50BLBAT and activated via the trigger controls or detached and activated via integrated controls on the microphone itself. The KTMPH50BLBAT also comes with a built-in siren and internal memory that allows you to record messages and play them on a loop. The Technical Pro MPHBattery is universal and compatible with most large megaphones including Pyle Seismic and Ampli-vox. The Technical Pro MPHBattery is simple and user-friendly with a built-in AC wall charger that opens and closes for convenience and an LED indicator to let you know its fully charged. Megaphone Features: Great for making announcements at sporting events parties and other large venues High powered bullhorn loudspeaker that helps your announcements go farther A wide variety of inputs that helps you get the most out of this loudspeaker Looping capabilities that enable you to play recorded messages Detachable handheld mic gives you additional freedom Peak Power: 75 Watts Input: USB/SD card Aux 3.5mm Up to 5 Hours of continuous use Battery: 8C batteries or rechargeable battery Anti-feedback Microphone 800M-1000M Range ABS construction and ergonomic pistol grip Handheld or shoulder strap (included) Playback features with playback controls Built in recording memory allows for recording 16 seconds of looped playback Police Siren Volume Control Microphone can be used with trigger button or set continuously on with Microphone switch Speaker Sensitivity SPL(F0):90 3dB 0.1W at0.9k/1.0k/1.2k/1.5k average Dimensions (L x W x H):9.1 x 9.1 x 14 Megaphone Battery Features: Designed to Work Technical Pro ER66 Megaphone Models Built in AC Wall charger LED charge status indicator Automatic charge Charge lasts for approximately 5-8 hours. Built-in rechargeable battery fully charges in approximately 4-6 hours For maximum battery life the battery should be fully charged prior to its initial use Dimensions (L x W x H):4.5 x 1.5 x 2.7