This is the GWS R4PII/H/J Pico 4ch HOR PIN J Type Receiver. FEATURES: FM Type Receiver Narrow Band Ultra Micro Design Positive shift for JR and Airtronics (Sanwa) INCLUDES: One R4PII/H/J Pico 4ch Micro Receiver REQUIRES: Crystal (GWSL01**) SPECS: Length: 1.00" (25mm) Width: 0.59" (15mm) Height: 0.37" (9.4mm) Modulation: FM (PPM) Sensitivity: 5uV Operating Power: 3.6-7.2V Current Drain: 5mAh Weight: 0.13oz-0.17oz (3.6g-4.8g) AJW 10-02-04 ir/jxs