Description de chez Thomann : - For digital wireless radio system EW-DX from Sennheiser - Suitable for 3-pin XLR gooseneck microphones (without LED ring) - Frequency range: 470.2 ? 550.00 Hz - Frequency range: 2402 - 2480 MHz - Wireless charging via Qi charging or via USB-C - Up to 11 hours battery life - Optional CHG2W charging base (Art.503841, not included in the scope of delivery) - Programmable On/Off/Mute button and battery level indicator with status LED - Dimensions (WxDxH): 121 x 167 x 49 mm - Weight (without fluid): 0.7 kg - Includes rechargeable battery (BA40) and instructions