Check the listing for details. Bruel & Kjaer Type 4230 Sound Level Calibrator. Condition: Used. Listed at 300.00 USD. Bruel & Kjaer TYPE 4230Sound Level Calibrator Pocket size cound source for accurate, everyday, calibration of sound level meters etc., using 1/2 and 1-inch microphones. KEY FEATURES Calibrator Output: Provides 94 dB re 20 uPs sound level at 1 kHz.​Calibration Accuracy: +/- 0.3 dB.Power Source: Internal. 9 Volt battery. OPTION / REMARKS Condition : Used. Untested. we sell it AS-IS. But, we got it from working environment. Warranty : 14 days of R.O.R PAYMENT We accept payment with Payoneer, Paypal. RETURN Please contact us first before returning. Return can be accepted within 14 days after item arrived, and it has to be in the original condition as it was sent out. Buyer is responsible for the postage of the returned item, and the original postage cost is not refundable. Additional return policy details: The buyer has 14 days to return the item (the buyer pays shipping fees). The item will be refunded. SHIPPING - We can ship worldwide - Buyer pays for all shipping cost. - We will let you know the shipping cost after we receive your shipping address - We accept any international couriers like DHL,FedEx, UPS....