The C411 is a lightweight vibration pickup for acoustic string instruments, designed to capture clear, natural sound. It attaches easily near the bridge using a nonmarking adhesive pad and is available in XLR or mini XLR versions for wired or wireless systems. From The Manufacturer: The C411 is a miniature vibration pickup for acoustic guitar, mandolin, violin and most other string instruments. Its integrated condenser capsule will reproduce the sound of the instrument clearly and without coloration. The C411 ultralight pickup (18g/0.6oz) can be easily attached on or near the bridge with the included nonmarking, solvent-free adhesive pad without changing the balance of the instrument. The C411 is available in two versions. The C411 PP features a MPAV standard XLR connector while the C411 L provides a professional three-pin mini XLR connector that fits the body-pack transmitters of all AKG wireless microphone systems. Specification: Type Pre-polarized condenser transducer Polar Pattern Figure of eight Audio frequency bandwidth 10 - 18000 Hz Sensitivity 2 mV/Pa Electrical impedance 200 Ohms Recommended load impedance 1000 Ohms Max. SPL for 1%/3% THD 96 dB / 103 dB Current consumption approx. 2.2 mA Length 9.7 mm Width 14.2 mm Height 26.7 mm Net Weight 18 g (0.6 oz.) Cable length 1.5 m (5 ft.) Body plastic Finish matte black Audio Output Mini XLR (Female) Contacts 3-pin Voltage 9 to 52 V Current 2 mA Application Live Instrument Instrument Piano / Strings