Shure QLXD2/Beta87c H51, digital UHF handheld transmitter with condenser Beta87c capsule, 24bit/48 KHz Audiosignal, AES-256 Advanced Encryption Standard encoding, up to 72 MHz bandwidth, 22 compatible channels per 8 MHz TV-Band, switchable transmitted power 1/10 mW, 120 dB dynamic range, metall housing with condenser Beta87c capsule, cardioid, IR frequency and setting transmission, XLR/jack out, transmitter works with SB 900 Lithium Ionen rechargeable battery Technology, optional also with 1,5V AA batteries, frequencyrange H51 (534-598 MHz), incl. rechargeable battery, bag and clamp