Mooer AP10 Air Plug Wireless System, Digital Wireless System, For guitar, bass, and acoustic instruments with Piezo pickups, 4 Switchable channels allow parallel use of up to 4 systems, Integrated, rechargeable lithium battery, Range of up to 15 m, Less than 5 ms latency, Frequency range: 20 - 20,000 Hz, 2.4 GHz ISM band for worldwide use, 24 bit / 48 kHz A/D converter for uncompressed digital signal transmission, > 103 dB Dynamic range, < 0.05% Distortion (THD), Up to 5 hours of battery life per charge, Power saving mode extends the battery life, On/Off switch, Channel switch, Status LEDs show selected channel and battery charge, Robust ABS housing, Dimensions (W x D x H): 117 x 42 x 30 mm, Includes USB charging cable and transport bag