Feature: The microphone uses high quality coils to ensure that the sound quality is not easily distorted. The signal output is stable, clear voice, no noise. The microphone adopts the UHF frequency band for signal transmission, and it has strong anti-interference ability, and the working distance is more than 15 meters (the distance is deviated due to the actual use environment). The receiver uses a 3.5mm audio connector that plugs directly into other audio devices, no need to use a connection output cable and assigning a 6.5mm adapter (it can be plugged directly into bus audio and outdoor cart speakers, etc.) This microphone system are suitable for: Karaoke, parties, DJ, wedding, church, business meetings, classroom activities, outdoor or stage performances and other occasions. Specification: Model: K380L Microphone power: AA battery(No-include ) Material: ABS+Zinc alloy Color: Black Weight: 335g / 11.8oz Package list: 1 * Microphone(No-include battery ) 1 * Mini Receiver(Built in battery ) 1 * USB charger 1 * Loudspeaker box convert adapter 1 * User manual Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Power supply: 1, the handheld microphone can be equipped with No. 5 AA battery (not included), battery life up to 10 hours; 2, Receiver built-in polymer lithium battery, battery life up to 5 hours; with DC-5V USB charging port, can be charged by mobile power at any time