Bose S1 Pro Plus Instr. Transmitter, 2.4 GHz Wireless System for Microphones, Especially for Bose S1 Pro Plus, Range up to 10 metres, Mute switch, Rechargeable via USB-C or in the built-in Bose S1 Pro Plus charging slot, Battery life up to 6 hours, Connector: 6.3 mm jack, Dimensions (W x H x D): 29 x 30 x 86 mm, Weight: 102 g, Colour: Black