ONE-YEAR WARRANTY: Bietrun offers a 1-Year warranty and free replacement service. Packing List: 2* Microphone, 1*3.5mm to 3.5mm cable, 1*Receiver, 1*Dual charging cable,1*Bluetooth Antenna,1*Adapter, 2*Microphone Antenna, 1*Manual, 1*6.35mm to 6.35mm cable. PLUG AND PLAY: ?The receiver has 6.35mm Mic+3.5mm TRS audio+XLR L+R 2 Channel output Interface.?You can choose 6.35mm(Included), 3.5mm(Included), XLR(Not included) cable you need to connect the other side to Speaker with a mic input, amplifiers, Bluetooth speakers, mixers, PA system, Karaoke Machine, Multi-Media Equipment, Etc. ?Receiver with Bluetooth, first connect the receiver with a speaker, then connect Bluetooth(Name: Bietrun) with your phone to play music and karaoke. PRO-CLEAR VOCALS DYNAMIC MICS: Built-in dynamic unidirectional microphone core (95dB±2dB), the vocal is clearer, eliminates background noise and howling.?Cool led light ring (working in green, charging in red), fashion clear white LED display.?Perfect for the conference, speech, web podcast, Yoga instructor, church, family party, opening ceremony, dancing instructor, promotion, etc. RECHARGEABLE DUAL HANDHELD MICROPHONES: ?No AA battery needed. ?The microphone has a built-in 1200mAh rechargeable lithium-ion battery, when fully charged the mics(3-4hours) can be used for up to 7 hours. ?The dual charging cable is included, supporting 2 microphones charging simultaneously. ?The receiver has a UL-Certified plug. PRO-UHF WIRELESS MICROPHONE SYSTEM: ?Adopt the latest connection technology chip. The connection distance is about 240feet (75M). ?No dropouts?No hiss?No feedback?Clear voice?Stable signal?Great sound quality. With 15 UHF Selectable frequency band(lawful signal bands(500 - 599Mhz) with US FCC ID), no need to worry about interferences.