Adopts premium electronic parts, with accuracy process, which ensures fine durability and long service time. Constant temperature 10MHz, ultra-low phase noise, low noise, portable and reliable. This product adopts 10MHz frequency standard, and which is provided by OCXO oven controlled crystal oscillator. Constant temperature crystal oscillator means that this product uses a constant temperature bath to keep the temperature of a crystal oscillator or a quartz crystal oscillator constant, so that the change in the output frequency of the oscillator caused by changes in the surrounding temperature is reduced to a minimum, which makes it has higher accuracy, ±0.01Hz. Equipped with SMA outer screw inner hole interface. Wide applications, which can be used for instrument benchmarks such as audio systems, decoders, shortwave radios, frequency meters, signal sources, etc. Name: Frequency Reference Source Current consumption: preheating stage Less than 750mA, working stage Less than 300mA Warm-up time: ≈ 5 minutes Calibration accuracy: ±0.01Hz Frequency stability: 5e-12 Output level: dBm: 10dBm±2dBm@50Ω VRMS: 0.7071V@50Ω VPeak: 1.0V@50Ω VP-P: 2.0V@50Ω Output impedance: 50Ω Interface type: SMA outer screw inner hole Item size: 67 x 58 x 14mm / 2.64 x 2.28 x 0.55inch Item weight: 40g / 1.41ounce/pcs DIY Supplies:ELECTRICAL Model Number:OCXO-10MHz color:Black Material:plastic Package Contents: 4 x Frequency Reference Source 4 x Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.