It is compact and portable to place at the violin or guitar case, no battery needed, it shows the current humidity and temperature clearly. Fit for: Violin, Guitar. Humidity Range: 20~100% RH. Round shape, compact and portable, it won't occupy too much space.
eBay
250/500/1000ML Easuring Cup Silicone Measuring Cups and Spoons Plastic Jug Digital Kitchen Scale Baking Tools Timer Accessories
Aliexpress UK
Convenient size and quality construction. Dependable reading with high accuracy. Dual readouts in one dial. Material: ABS. Color: White.
eBay
5kg/0.1g/1g Smart Kitchen Scales Nutrition Scale Smart Food Calories Scale Cook Bake Digital Scale with Nutrition Calculator APP
Aliexpress UK
Car and Gadget. Humidity accuracy: ± 5%. Temperature range -50C to 70C. Temperature accuracy: ± 1C. INCLUDES FREE BATTERIES .
eBay
STC1000 LED Digital Temperature Controller AC110-220V Relay Thermoregulator Thermostat with NTC Sensor for Heater Freezer Fridge
Aliexpress UK
Humidity range 10% -99% RH (relative humidity). Humidity Accuracy Temperature resolution: 0.1℃. Temperature range Temperature resolution (Not included).
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TIMEMORE Store Black Mirror Mini New Espresso Coffee Food Kitchen Scale With Time USB Light Weight Digital Scale
Aliexpress UK
Humidity Range:10%–99% RH. Perfect for maintaining healthy living conditions and protecting furniture, electronics, and plants from unsuitable temperature or humidity levels. Temperature Range: approx.-10°C to 50°C (14°F to 122°F).
eBay
Digital Kitchen Scale Mini Pocket Stainless Steel Precision Jewelry Electronic Balance Weight Gold Gram 0.1/3000g Weigh Scales
Aliexpress UK
Humidity Resolution: 1%. Daily Alarm Function. 12/24 Hourly Clock. Temperature Resolution: 0.1°C (0.2°F).
eBay
Digital Kitchen Timer 10-Alarms Clocks 99 Hours Countdown Mute/Vibration Magnetic Alarm Clock Table Timers for Cooking Studying
Aliexpress UK
Humidity: WET diagram is displayed at any temperature and humidity ≥ 70%~95%. Drying: any temperature, humidity less than or equal to 29%, DRY diagram is displayed. Comfortable: When the temperature is 18 ℃～ 26 ℃ and the humidity is 30% ～ 69%, COMFORT is displayed.
eBay
65cm Gas Stove Thermocouple Universal Screw Heater Thermocouple Kit Burner Cooker Fireplace Parts Digital Temperature Controller
Aliexpress UK
Humidity accuracy :± 5 % RH. Humidity resolution : 1% RH. 12 / 24-hour system clock. Large screen LCD display. Temperature accuracy : ± 2 ℃ ( 3.6 ℉ ). Temperature resolution : 0.1 ℃( 0.1℉ ). Product size :100 62 15 mm.
eBay
Digital Kitchen Scale 500g/0.01g Mini Pocket Jewelry Scale Cooking Food Scale Electronic Balance Scale
Aliexpress UK